./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/loop-invgen/heapsort.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version eb692b52 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerReach.xml -i ../sv-benchmarks/c/loop-invgen/heapsort.i -s /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 8e7c8e5dc2a9e8f11b25d1bb9948f05f37b9553e3dc9f8bd8213088dea43cb37 --- Real Ultimate output --- This is Ultimate 0.2.2-?-eb692b5 [2022-07-19 15:04:12,704 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-07-19 15:04:12,705 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-07-19 15:04:12,750 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-07-19 15:04:12,751 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-07-19 15:04:12,752 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-07-19 15:04:12,752 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-07-19 15:04:12,754 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-07-19 15:04:12,755 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-07-19 15:04:12,755 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-07-19 15:04:12,756 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-07-19 15:04:12,757 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-07-19 15:04:12,757 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-07-19 15:04:12,757 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-07-19 15:04:12,758 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-07-19 15:04:12,759 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-07-19 15:04:12,759 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-07-19 15:04:12,760 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-07-19 15:04:12,761 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-07-19 15:04:12,762 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-07-19 15:04:12,763 INFO L181 SettingsManager]: Resetting HornVerifier preferences to default values [2022-07-19 15:04:12,765 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-07-19 15:04:12,765 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-07-19 15:04:12,766 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-07-19 15:04:12,767 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-07-19 15:04:12,769 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-07-19 15:04:12,771 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-07-19 15:04:12,772 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-07-19 15:04:12,772 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-07-19 15:04:12,773 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-07-19 15:04:12,774 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-07-19 15:04:12,774 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-07-19 15:04:12,775 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-07-19 15:04:12,776 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-07-19 15:04:12,776 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-07-19 15:04:12,777 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-07-19 15:04:12,777 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-07-19 15:04:12,777 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-07-19 15:04:12,778 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-07-19 15:04:12,778 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-07-19 15:04:12,778 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-07-19 15:04:12,780 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-07-19 15:04:12,781 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2022-07-19 15:04:12,799 INFO L113 SettingsManager]: Loading preferences was successful [2022-07-19 15:04:12,799 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-07-19 15:04:12,800 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-07-19 15:04:12,800 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-07-19 15:04:12,800 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-07-19 15:04:12,800 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-07-19 15:04:12,801 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-07-19 15:04:12,801 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-07-19 15:04:12,801 INFO L138 SettingsManager]: * Use SBE=true [2022-07-19 15:04:12,801 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-07-19 15:04:12,801 INFO L138 SettingsManager]: * sizeof long=4 [2022-07-19 15:04:12,802 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-07-19 15:04:12,802 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-07-19 15:04:12,802 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-07-19 15:04:12,802 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-07-19 15:04:12,802 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-07-19 15:04:12,802 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-07-19 15:04:12,803 INFO L138 SettingsManager]: * sizeof long double=12 [2022-07-19 15:04:12,803 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-07-19 15:04:12,803 INFO L138 SettingsManager]: * Use constant arrays=true [2022-07-19 15:04:12,803 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-07-19 15:04:12,803 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-07-19 15:04:12,803 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-07-19 15:04:12,804 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-07-19 15:04:12,804 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-07-19 15:04:12,804 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-07-19 15:04:12,804 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-07-19 15:04:12,804 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-07-19 15:04:12,804 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-07-19 15:04:12,804 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-07-19 15:04:12,805 INFO L138 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2022-07-19 15:04:12,805 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-07-19 15:04:12,805 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-07-19 15:04:12,805 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 8e7c8e5dc2a9e8f11b25d1bb9948f05f37b9553e3dc9f8bd8213088dea43cb37 [2022-07-19 15:04:12,968 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-07-19 15:04:13,006 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-07-19 15:04:13,009 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-07-19 15:04:13,010 INFO L271 PluginConnector]: Initializing CDTParser... [2022-07-19 15:04:13,010 INFO L275 PluginConnector]: CDTParser initialized [2022-07-19 15:04:13,011 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/loop-invgen/heapsort.i [2022-07-19 15:04:13,058 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/475f3ead8/e3d4fa1901294e4683076d2bd3fa2d4f/FLAGb233d5ed1 [2022-07-19 15:04:13,424 INFO L306 CDTParser]: Found 1 translation units. [2022-07-19 15:04:13,427 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/loop-invgen/heapsort.i [2022-07-19 15:04:13,432 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/475f3ead8/e3d4fa1901294e4683076d2bd3fa2d4f/FLAGb233d5ed1 [2022-07-19 15:04:13,441 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/475f3ead8/e3d4fa1901294e4683076d2bd3fa2d4f [2022-07-19 15:04:13,443 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-07-19 15:04:13,444 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-07-19 15:04:13,445 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-07-19 15:04:13,445 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-07-19 15:04:13,449 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-07-19 15:04:13,450 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.07 03:04:13" (1/1) ... [2022-07-19 15:04:13,450 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@1aecee10 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 03:04:13, skipping insertion in model container [2022-07-19 15:04:13,451 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.07 03:04:13" (1/1) ... [2022-07-19 15:04:13,456 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-07-19 15:04:13,467 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-07-19 15:04:13,589 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/loop-invgen/heapsort.i[893,906] [2022-07-19 15:04:13,601 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-07-19 15:04:13,606 INFO L203 MainTranslator]: Completed pre-run [2022-07-19 15:04:13,615 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/loop-invgen/heapsort.i[893,906] [2022-07-19 15:04:13,621 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-07-19 15:04:13,629 INFO L208 MainTranslator]: Completed translation [2022-07-19 15:04:13,629 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 03:04:13 WrapperNode [2022-07-19 15:04:13,630 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-07-19 15:04:13,630 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-07-19 15:04:13,630 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-07-19 15:04:13,631 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-07-19 15:04:13,635 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 03:04:13" (1/1) ... [2022-07-19 15:04:13,639 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 03:04:13" (1/1) ... [2022-07-19 15:04:13,651 INFO L137 Inliner]: procedures = 16, calls = 20, calls flagged for inlining = 2, calls inlined = 2, statements flattened = 77 [2022-07-19 15:04:13,651 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-07-19 15:04:13,652 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-07-19 15:04:13,652 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-07-19 15:04:13,652 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-07-19 15:04:13,657 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 03:04:13" (1/1) ... [2022-07-19 15:04:13,657 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 03:04:13" (1/1) ... [2022-07-19 15:04:13,658 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 03:04:13" (1/1) ... [2022-07-19 15:04:13,658 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 03:04:13" (1/1) ... [2022-07-19 15:04:13,660 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 03:04:13" (1/1) ... [2022-07-19 15:04:13,663 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 03:04:13" (1/1) ... [2022-07-19 15:04:13,665 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 03:04:13" (1/1) ... [2022-07-19 15:04:13,666 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-07-19 15:04:13,669 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-07-19 15:04:13,670 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-07-19 15:04:13,671 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-07-19 15:04:13,675 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 03:04:13" (1/1) ... [2022-07-19 15:04:13,686 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-07-19 15:04:13,693 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-19 15:04:13,703 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-07-19 15:04:13,707 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-07-19 15:04:13,731 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-07-19 15:04:13,732 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-07-19 15:04:13,732 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-07-19 15:04:13,732 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-07-19 15:04:13,732 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2022-07-19 15:04:13,733 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2022-07-19 15:04:13,773 INFO L234 CfgBuilder]: Building ICFG [2022-07-19 15:04:13,774 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-07-19 15:04:13,873 INFO L275 CfgBuilder]: Performing block encoding [2022-07-19 15:04:13,877 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-07-19 15:04:13,878 INFO L299 CfgBuilder]: Removed 2 assume(true) statements. [2022-07-19 15:04:13,879 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.07 03:04:13 BoogieIcfgContainer [2022-07-19 15:04:13,879 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-07-19 15:04:13,880 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-07-19 15:04:13,881 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-07-19 15:04:13,883 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-07-19 15:04:13,883 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 19.07 03:04:13" (1/3) ... [2022-07-19 15:04:13,900 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1bf2dbbe and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.07 03:04:13, skipping insertion in model container [2022-07-19 15:04:13,900 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 03:04:13" (2/3) ... [2022-07-19 15:04:13,900 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1bf2dbbe and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.07 03:04:13, skipping insertion in model container [2022-07-19 15:04:13,905 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.07 03:04:13" (3/3) ... [2022-07-19 15:04:13,906 INFO L111 eAbstractionObserver]: Analyzing ICFG heapsort.i [2022-07-19 15:04:13,915 INFO L201 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-07-19 15:04:13,916 INFO L160 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-07-19 15:04:13,962 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-07-19 15:04:13,972 INFO L357 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mPorIndependenceSettings=de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings@665cfd, mLbeIndependenceSettings=de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings@fb141b7 [2022-07-19 15:04:13,972 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-07-19 15:04:13,975 INFO L276 IsEmpty]: Start isEmpty. Operand has 39 states, 22 states have (on average 1.5454545454545454) internal successors, (34), 23 states have internal predecessors, (34), 14 states have call successors, (14), 1 states have call predecessors, (14), 1 states have return successors, (14), 14 states have call predecessors, (14), 14 states have call successors, (14) [2022-07-19 15:04:13,989 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2022-07-19 15:04:13,989 INFO L187 NwaCegarLoop]: Found error trace [2022-07-19 15:04:13,989 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-19 15:04:13,990 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-19 15:04:13,993 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 15:04:13,993 INFO L85 PathProgramCache]: Analyzing trace with hash -1754201352, now seen corresponding path program 1 times [2022-07-19 15:04:13,999 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 15:04:13,999 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [336889979] [2022-07-19 15:04:14,000 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 15:04:14,000 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 15:04:14,064 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 15:04:14,142 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 15:04:14,143 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 15:04:14,143 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [336889979] [2022-07-19 15:04:14,143 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [336889979] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-19 15:04:14,144 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-19 15:04:14,144 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-07-19 15:04:14,145 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1696536899] [2022-07-19 15:04:14,145 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-19 15:04:14,148 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-07-19 15:04:14,148 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 15:04:14,168 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-07-19 15:04:14,169 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-07-19 15:04:14,170 INFO L87 Difference]: Start difference. First operand has 39 states, 22 states have (on average 1.5454545454545454) internal successors, (34), 23 states have internal predecessors, (34), 14 states have call successors, (14), 1 states have call predecessors, (14), 1 states have return successors, (14), 14 states have call predecessors, (14), 14 states have call successors, (14) Second operand has 5 states, 4 states have (on average 2.5) internal successors, (10), 4 states have internal predecessors, (10), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 15:04:14,267 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-19 15:04:14,269 INFO L93 Difference]: Finished difference Result 104 states and 193 transitions. [2022-07-19 15:04:14,270 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-07-19 15:04:14,271 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 2.5) internal successors, (10), 4 states have internal predecessors, (10), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 11 [2022-07-19 15:04:14,271 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-19 15:04:14,277 INFO L225 Difference]: With dead ends: 104 [2022-07-19 15:04:14,277 INFO L226 Difference]: Without dead ends: 61 [2022-07-19 15:04:14,279 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2022-07-19 15:04:14,281 INFO L413 NwaCegarLoop]: 64 mSDtfsCounter, 25 mSDsluCounter, 156 mSDsCounter, 0 mSdLazyCounter, 49 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 39 SdHoareTripleChecker+Valid, 220 SdHoareTripleChecker+Invalid, 52 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 49 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-19 15:04:14,282 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [39 Valid, 220 Invalid, 52 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 49 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-19 15:04:14,292 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 61 states. [2022-07-19 15:04:14,310 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 61 to 39. [2022-07-19 15:04:14,311 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 39 states, 22 states have (on average 1.3181818181818181) internal successors, (29), 22 states have internal predecessors, (29), 14 states have call successors, (14), 2 states have call predecessors, (14), 2 states have return successors, (14), 14 states have call predecessors, (14), 14 states have call successors, (14) [2022-07-19 15:04:14,312 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 57 transitions. [2022-07-19 15:04:14,313 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 57 transitions. Word has length 11 [2022-07-19 15:04:14,313 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-19 15:04:14,313 INFO L495 AbstractCegarLoop]: Abstraction has 39 states and 57 transitions. [2022-07-19 15:04:14,313 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 2.5) internal successors, (10), 4 states have internal predecessors, (10), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 15:04:14,313 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 57 transitions. [2022-07-19 15:04:14,314 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2022-07-19 15:04:14,314 INFO L187 NwaCegarLoop]: Found error trace [2022-07-19 15:04:14,314 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-19 15:04:14,314 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-07-19 15:04:14,315 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-19 15:04:14,315 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 15:04:14,315 INFO L85 PathProgramCache]: Analyzing trace with hash -1749464583, now seen corresponding path program 1 times [2022-07-19 15:04:14,316 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 15:04:14,316 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1999215105] [2022-07-19 15:04:14,316 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 15:04:14,316 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 15:04:14,327 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 15:04:14,356 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 15:04:14,357 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 15:04:14,357 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1999215105] [2022-07-19 15:04:14,357 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1999215105] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-19 15:04:14,357 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-19 15:04:14,358 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-07-19 15:04:14,358 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2064283717] [2022-07-19 15:04:14,358 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-19 15:04:14,359 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-07-19 15:04:14,359 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 15:04:14,359 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-07-19 15:04:14,360 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-07-19 15:04:14,360 INFO L87 Difference]: Start difference. First operand 39 states and 57 transitions. Second operand has 5 states, 5 states have (on average 2.0) internal successors, (10), 4 states have internal predecessors, (10), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 15:04:14,432 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-19 15:04:14,433 INFO L93 Difference]: Finished difference Result 46 states and 63 transitions. [2022-07-19 15:04:14,433 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-07-19 15:04:14,433 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.0) internal successors, (10), 4 states have internal predecessors, (10), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 11 [2022-07-19 15:04:14,434 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-19 15:04:14,434 INFO L225 Difference]: With dead ends: 46 [2022-07-19 15:04:14,434 INFO L226 Difference]: Without dead ends: 44 [2022-07-19 15:04:14,436 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2022-07-19 15:04:14,437 INFO L413 NwaCegarLoop]: 47 mSDtfsCounter, 17 mSDsluCounter, 90 mSDsCounter, 0 mSdLazyCounter, 51 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 31 SdHoareTripleChecker+Valid, 137 SdHoareTripleChecker+Invalid, 53 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 51 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-19 15:04:14,438 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [31 Valid, 137 Invalid, 53 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 51 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-19 15:04:14,439 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44 states. [2022-07-19 15:04:14,446 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44 to 43. [2022-07-19 15:04:14,446 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 43 states, 25 states have (on average 1.28) internal successors, (32), 25 states have internal predecessors, (32), 14 states have call successors, (14), 3 states have call predecessors, (14), 3 states have return successors, (14), 14 states have call predecessors, (14), 14 states have call successors, (14) [2022-07-19 15:04:14,447 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 60 transitions. [2022-07-19 15:04:14,447 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 60 transitions. Word has length 11 [2022-07-19 15:04:14,447 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-19 15:04:14,457 INFO L495 AbstractCegarLoop]: Abstraction has 43 states and 60 transitions. [2022-07-19 15:04:14,457 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 2.0) internal successors, (10), 4 states have internal predecessors, (10), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 15:04:14,458 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 60 transitions. [2022-07-19 15:04:14,458 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2022-07-19 15:04:14,458 INFO L187 NwaCegarLoop]: Found error trace [2022-07-19 15:04:14,458 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-19 15:04:14,458 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-07-19 15:04:14,458 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-19 15:04:14,459 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 15:04:14,459 INFO L85 PathProgramCache]: Analyzing trace with hash -1728015063, now seen corresponding path program 1 times [2022-07-19 15:04:14,459 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 15:04:14,459 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1231052151] [2022-07-19 15:04:14,459 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 15:04:14,460 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 15:04:14,471 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 15:04:14,511 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 15:04:14,512 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 15:04:14,512 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1231052151] [2022-07-19 15:04:14,512 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1231052151] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-19 15:04:14,512 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-19 15:04:14,513 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-07-19 15:04:14,513 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [401222502] [2022-07-19 15:04:14,513 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-19 15:04:14,513 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-07-19 15:04:14,513 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 15:04:14,514 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-07-19 15:04:14,514 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-07-19 15:04:14,514 INFO L87 Difference]: Start difference. First operand 43 states and 60 transitions. Second operand has 6 states, 6 states have (on average 1.6666666666666667) internal successors, (10), 5 states have internal predecessors, (10), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 15:04:14,677 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-19 15:04:14,677 INFO L93 Difference]: Finished difference Result 76 states and 111 transitions. [2022-07-19 15:04:14,678 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-07-19 15:04:14,678 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 1.6666666666666667) internal successors, (10), 5 states have internal predecessors, (10), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 11 [2022-07-19 15:04:14,678 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-19 15:04:14,679 INFO L225 Difference]: With dead ends: 76 [2022-07-19 15:04:14,679 INFO L226 Difference]: Without dead ends: 74 [2022-07-19 15:04:14,679 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2022-07-19 15:04:14,680 INFO L413 NwaCegarLoop]: 49 mSDtfsCounter, 30 mSDsluCounter, 135 mSDsCounter, 0 mSdLazyCounter, 125 mSolverCounterSat, 41 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 32 SdHoareTripleChecker+Valid, 184 SdHoareTripleChecker+Invalid, 166 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 41 IncrementalHoareTripleChecker+Valid, 125 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-19 15:04:14,681 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [32 Valid, 184 Invalid, 166 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [41 Valid, 125 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-19 15:04:14,682 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 74 states. [2022-07-19 15:04:14,691 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 74 to 69. [2022-07-19 15:04:14,694 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 69 states, 38 states have (on average 1.3157894736842106) internal successors, (50), 38 states have internal predecessors, (50), 26 states have call successors, (26), 4 states have call predecessors, (26), 4 states have return successors, (26), 26 states have call predecessors, (26), 26 states have call successors, (26) [2022-07-19 15:04:14,695 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 69 states to 69 states and 102 transitions. [2022-07-19 15:04:14,698 INFO L78 Accepts]: Start accepts. Automaton has 69 states and 102 transitions. Word has length 11 [2022-07-19 15:04:14,698 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-19 15:04:14,698 INFO L495 AbstractCegarLoop]: Abstraction has 69 states and 102 transitions. [2022-07-19 15:04:14,698 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 1.6666666666666667) internal successors, (10), 5 states have internal predecessors, (10), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 15:04:14,699 INFO L276 IsEmpty]: Start isEmpty. Operand 69 states and 102 transitions. [2022-07-19 15:04:14,699 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2022-07-19 15:04:14,700 INFO L187 NwaCegarLoop]: Found error trace [2022-07-19 15:04:14,700 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-19 15:04:14,700 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-07-19 15:04:14,700 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-19 15:04:14,701 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 15:04:14,704 INFO L85 PathProgramCache]: Analyzing trace with hash -1885075524, now seen corresponding path program 1 times [2022-07-19 15:04:14,704 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 15:04:14,705 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [636195935] [2022-07-19 15:04:14,705 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 15:04:14,705 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 15:04:14,717 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 15:04:14,776 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-07-19 15:04:14,779 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 15:04:14,781 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 15:04:14,782 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 15:04:14,782 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [636195935] [2022-07-19 15:04:14,782 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [636195935] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-19 15:04:14,782 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-19 15:04:14,782 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-07-19 15:04:14,782 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [151603406] [2022-07-19 15:04:14,783 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-19 15:04:14,783 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-07-19 15:04:14,783 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 15:04:14,784 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-07-19 15:04:14,784 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2022-07-19 15:04:14,784 INFO L87 Difference]: Start difference. First operand 69 states and 102 transitions. Second operand has 7 states, 7 states have (on average 1.8571428571428572) internal successors, (13), 6 states have internal predecessors, (13), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-07-19 15:04:14,960 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-19 15:04:14,960 INFO L93 Difference]: Finished difference Result 102 states and 153 transitions. [2022-07-19 15:04:14,961 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-07-19 15:04:14,962 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 1.8571428571428572) internal successors, (13), 6 states have internal predecessors, (13), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 16 [2022-07-19 15:04:14,962 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-19 15:04:14,967 INFO L225 Difference]: With dead ends: 102 [2022-07-19 15:04:14,967 INFO L226 Difference]: Without dead ends: 100 [2022-07-19 15:04:14,968 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2022-07-19 15:04:14,979 INFO L413 NwaCegarLoop]: 67 mSDtfsCounter, 43 mSDsluCounter, 146 mSDsCounter, 0 mSdLazyCounter, 184 mSolverCounterSat, 35 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 57 SdHoareTripleChecker+Valid, 213 SdHoareTripleChecker+Invalid, 219 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 35 IncrementalHoareTripleChecker+Valid, 184 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-19 15:04:14,979 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [57 Valid, 213 Invalid, 219 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [35 Valid, 184 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-19 15:04:14,980 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 100 states. [2022-07-19 15:04:15,002 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 100 to 97. [2022-07-19 15:04:15,003 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 97 states, 51 states have (on average 1.3333333333333333) internal successors, (68), 52 states have internal predecessors, (68), 40 states have call successors, (40), 5 states have call predecessors, (40), 5 states have return successors, (40), 39 states have call predecessors, (40), 40 states have call successors, (40) [2022-07-19 15:04:15,004 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 97 states to 97 states and 148 transitions. [2022-07-19 15:04:15,004 INFO L78 Accepts]: Start accepts. Automaton has 97 states and 148 transitions. Word has length 16 [2022-07-19 15:04:15,004 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-19 15:04:15,004 INFO L495 AbstractCegarLoop]: Abstraction has 97 states and 148 transitions. [2022-07-19 15:04:15,004 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 1.8571428571428572) internal successors, (13), 6 states have internal predecessors, (13), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-07-19 15:04:15,005 INFO L276 IsEmpty]: Start isEmpty. Operand 97 states and 148 transitions. [2022-07-19 15:04:15,005 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2022-07-19 15:04:15,005 INFO L187 NwaCegarLoop]: Found error trace [2022-07-19 15:04:15,005 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-19 15:04:15,006 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2022-07-19 15:04:15,006 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-19 15:04:15,006 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 15:04:15,006 INFO L85 PathProgramCache]: Analyzing trace with hash -1503713061, now seen corresponding path program 1 times [2022-07-19 15:04:15,006 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 15:04:15,007 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [428188076] [2022-07-19 15:04:15,007 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 15:04:15,007 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 15:04:15,016 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 15:04:15,051 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-07-19 15:04:15,054 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 15:04:15,056 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 15:04:15,056 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 15:04:15,056 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [428188076] [2022-07-19 15:04:15,056 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [428188076] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-19 15:04:15,056 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-19 15:04:15,056 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-07-19 15:04:15,056 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [210699539] [2022-07-19 15:04:15,056 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-19 15:04:15,057 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-07-19 15:04:15,057 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 15:04:15,057 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-07-19 15:04:15,057 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-07-19 15:04:15,057 INFO L87 Difference]: Start difference. First operand 97 states and 148 transitions. Second operand has 5 states, 5 states have (on average 2.6) internal successors, (13), 4 states have internal predecessors, (13), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-07-19 15:04:15,123 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-19 15:04:15,124 INFO L93 Difference]: Finished difference Result 103 states and 153 transitions. [2022-07-19 15:04:15,124 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-07-19 15:04:15,125 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.6) internal successors, (13), 4 states have internal predecessors, (13), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 16 [2022-07-19 15:04:15,125 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-19 15:04:15,127 INFO L225 Difference]: With dead ends: 103 [2022-07-19 15:04:15,128 INFO L226 Difference]: Without dead ends: 101 [2022-07-19 15:04:15,128 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2022-07-19 15:04:15,133 INFO L413 NwaCegarLoop]: 47 mSDtfsCounter, 16 mSDsluCounter, 78 mSDsCounter, 0 mSdLazyCounter, 61 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 29 SdHoareTripleChecker+Valid, 125 SdHoareTripleChecker+Invalid, 64 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 61 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-19 15:04:15,133 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [29 Valid, 125 Invalid, 64 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 61 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-19 15:04:15,135 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 101 states. [2022-07-19 15:04:15,159 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 101 to 101. [2022-07-19 15:04:15,160 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 101 states, 54 states have (on average 1.3148148148148149) internal successors, (71), 55 states have internal predecessors, (71), 40 states have call successors, (40), 6 states have call predecessors, (40), 6 states have return successors, (40), 39 states have call predecessors, (40), 40 states have call successors, (40) [2022-07-19 15:04:15,161 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 101 states to 101 states and 151 transitions. [2022-07-19 15:04:15,161 INFO L78 Accepts]: Start accepts. Automaton has 101 states and 151 transitions. Word has length 16 [2022-07-19 15:04:15,161 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-19 15:04:15,161 INFO L495 AbstractCegarLoop]: Abstraction has 101 states and 151 transitions. [2022-07-19 15:04:15,161 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 2.6) internal successors, (13), 4 states have internal predecessors, (13), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-07-19 15:04:15,162 INFO L276 IsEmpty]: Start isEmpty. Operand 101 states and 151 transitions. [2022-07-19 15:04:15,162 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2022-07-19 15:04:15,162 INFO L187 NwaCegarLoop]: Found error trace [2022-07-19 15:04:15,163 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-19 15:04:15,163 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2022-07-19 15:04:15,166 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-19 15:04:15,166 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 15:04:15,167 INFO L85 PathProgramCache]: Analyzing trace with hash -1518715221, now seen corresponding path program 1 times [2022-07-19 15:04:15,167 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 15:04:15,167 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [387422715] [2022-07-19 15:04:15,171 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 15:04:15,171 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 15:04:15,194 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 15:04:15,237 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-07-19 15:04:15,239 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 15:04:15,243 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 15:04:15,243 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 15:04:15,243 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [387422715] [2022-07-19 15:04:15,243 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [387422715] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-19 15:04:15,244 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-19 15:04:15,244 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-07-19 15:04:15,244 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1367075028] [2022-07-19 15:04:15,244 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-19 15:04:15,244 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-07-19 15:04:15,244 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 15:04:15,245 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-07-19 15:04:15,245 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2022-07-19 15:04:15,245 INFO L87 Difference]: Start difference. First operand 101 states and 151 transitions. Second operand has 7 states, 7 states have (on average 1.8571428571428572) internal successors, (13), 6 states have internal predecessors, (13), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-07-19 15:04:15,459 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-19 15:04:15,459 INFO L93 Difference]: Finished difference Result 155 states and 240 transitions. [2022-07-19 15:04:15,459 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-07-19 15:04:15,460 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 1.8571428571428572) internal successors, (13), 6 states have internal predecessors, (13), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 16 [2022-07-19 15:04:15,460 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-19 15:04:15,462 INFO L225 Difference]: With dead ends: 155 [2022-07-19 15:04:15,462 INFO L226 Difference]: Without dead ends: 153 [2022-07-19 15:04:15,463 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2022-07-19 15:04:15,464 INFO L413 NwaCegarLoop]: 80 mSDtfsCounter, 64 mSDsluCounter, 168 mSDsCounter, 0 mSdLazyCounter, 193 mSolverCounterSat, 64 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 92 SdHoareTripleChecker+Valid, 248 SdHoareTripleChecker+Invalid, 257 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 64 IncrementalHoareTripleChecker+Valid, 193 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-07-19 15:04:15,465 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [92 Valid, 248 Invalid, 257 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [64 Valid, 193 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-07-19 15:04:15,467 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 153 states. [2022-07-19 15:04:15,502 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 153 to 137. [2022-07-19 15:04:15,503 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 137 states, 69 states have (on average 1.3623188405797102) internal successors, (94), 72 states have internal predecessors, (94), 60 states have call successors, (60), 7 states have call predecessors, (60), 7 states have return successors, (60), 57 states have call predecessors, (60), 60 states have call successors, (60) [2022-07-19 15:04:15,506 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 137 states to 137 states and 214 transitions. [2022-07-19 15:04:15,507 INFO L78 Accepts]: Start accepts. Automaton has 137 states and 214 transitions. Word has length 16 [2022-07-19 15:04:15,507 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-19 15:04:15,507 INFO L495 AbstractCegarLoop]: Abstraction has 137 states and 214 transitions. [2022-07-19 15:04:15,507 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 1.8571428571428572) internal successors, (13), 6 states have internal predecessors, (13), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-07-19 15:04:15,507 INFO L276 IsEmpty]: Start isEmpty. Operand 137 states and 214 transitions. [2022-07-19 15:04:15,512 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2022-07-19 15:04:15,512 INFO L187 NwaCegarLoop]: Found error trace [2022-07-19 15:04:15,512 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-19 15:04:15,513 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2022-07-19 15:04:15,513 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-19 15:04:15,514 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 15:04:15,514 INFO L85 PathProgramCache]: Analyzing trace with hash 1823085758, now seen corresponding path program 1 times [2022-07-19 15:04:15,514 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 15:04:15,515 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [479760489] [2022-07-19 15:04:15,515 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 15:04:15,515 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 15:04:15,532 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 15:04:15,545 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-07-19 15:04:15,547 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 15:04:15,551 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 15:04:15,551 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 15:04:15,552 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [479760489] [2022-07-19 15:04:15,552 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [479760489] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-19 15:04:15,552 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-19 15:04:15,552 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-19 15:04:15,552 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [418175865] [2022-07-19 15:04:15,553 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-19 15:04:15,553 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-19 15:04:15,553 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 15:04:15,554 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-19 15:04:15,554 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-19 15:04:15,554 INFO L87 Difference]: Start difference. First operand 137 states and 214 transitions. Second operand has 3 states, 3 states have (on average 4.333333333333333) internal successors, (13), 3 states have internal predecessors, (13), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-07-19 15:04:15,585 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-19 15:04:15,586 INFO L93 Difference]: Finished difference Result 274 states and 436 transitions. [2022-07-19 15:04:15,586 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-19 15:04:15,586 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 4.333333333333333) internal successors, (13), 3 states have internal predecessors, (13), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 16 [2022-07-19 15:04:15,587 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-19 15:04:15,588 INFO L225 Difference]: With dead ends: 274 [2022-07-19 15:04:15,589 INFO L226 Difference]: Without dead ends: 205 [2022-07-19 15:04:15,592 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-19 15:04:15,592 INFO L413 NwaCegarLoop]: 77 mSDtfsCounter, 11 mSDsluCounter, 47 mSDsCounter, 0 mSdLazyCounter, 10 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 23 SdHoareTripleChecker+Valid, 124 SdHoareTripleChecker+Invalid, 11 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 10 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-19 15:04:15,593 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [23 Valid, 124 Invalid, 11 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 10 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-19 15:04:15,594 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 205 states. [2022-07-19 15:04:15,622 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 205 to 205. [2022-07-19 15:04:15,623 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 205 states, 99 states have (on average 1.404040404040404) internal successors, (139), 103 states have internal predecessors, (139), 98 states have call successors, (98), 7 states have call predecessors, (98), 7 states have return successors, (98), 94 states have call predecessors, (98), 98 states have call successors, (98) [2022-07-19 15:04:15,624 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 205 states to 205 states and 335 transitions. [2022-07-19 15:04:15,624 INFO L78 Accepts]: Start accepts. Automaton has 205 states and 335 transitions. Word has length 16 [2022-07-19 15:04:15,624 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-19 15:04:15,624 INFO L495 AbstractCegarLoop]: Abstraction has 205 states and 335 transitions. [2022-07-19 15:04:15,624 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 4.333333333333333) internal successors, (13), 3 states have internal predecessors, (13), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-07-19 15:04:15,625 INFO L276 IsEmpty]: Start isEmpty. Operand 205 states and 335 transitions. [2022-07-19 15:04:15,625 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2022-07-19 15:04:15,625 INFO L187 NwaCegarLoop]: Found error trace [2022-07-19 15:04:15,625 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-19 15:04:15,625 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2022-07-19 15:04:15,625 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-19 15:04:15,626 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 15:04:15,626 INFO L85 PathProgramCache]: Analyzing trace with hash -2105521235, now seen corresponding path program 1 times [2022-07-19 15:04:15,626 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 15:04:15,626 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [834663587] [2022-07-19 15:04:15,626 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 15:04:15,626 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 15:04:15,633 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 15:04:15,648 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-07-19 15:04:15,659 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 15:04:15,661 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 15:04:15,661 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 15:04:15,661 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [834663587] [2022-07-19 15:04:15,661 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [834663587] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-19 15:04:15,661 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-19 15:04:15,661 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-07-19 15:04:15,661 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1146183345] [2022-07-19 15:04:15,662 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-19 15:04:15,662 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-07-19 15:04:15,662 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 15:04:15,662 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-07-19 15:04:15,662 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-07-19 15:04:15,663 INFO L87 Difference]: Start difference. First operand 205 states and 335 transitions. Second operand has 5 states, 5 states have (on average 2.6) internal successors, (13), 5 states have internal predecessors, (13), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-07-19 15:04:15,722 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-19 15:04:15,723 INFO L93 Difference]: Finished difference Result 230 states and 359 transitions. [2022-07-19 15:04:15,723 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-07-19 15:04:15,723 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.6) internal successors, (13), 5 states have internal predecessors, (13), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 16 [2022-07-19 15:04:15,723 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-19 15:04:15,724 INFO L225 Difference]: With dead ends: 230 [2022-07-19 15:04:15,725 INFO L226 Difference]: Without dead ends: 183 [2022-07-19 15:04:15,725 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2022-07-19 15:04:15,725 INFO L413 NwaCegarLoop]: 54 mSDtfsCounter, 5 mSDsluCounter, 106 mSDsCounter, 0 mSdLazyCounter, 63 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 5 SdHoareTripleChecker+Valid, 160 SdHoareTripleChecker+Invalid, 71 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 63 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-19 15:04:15,726 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [5 Valid, 160 Invalid, 71 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 63 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-19 15:04:15,726 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 183 states. [2022-07-19 15:04:15,747 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 183 to 183. [2022-07-19 15:04:15,747 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 183 states, 89 states have (on average 1.3932584269662922) internal successors, (124), 93 states have internal predecessors, (124), 86 states have call successors, (86), 7 states have call predecessors, (86), 7 states have return successors, (86), 82 states have call predecessors, (86), 86 states have call successors, (86) [2022-07-19 15:04:15,748 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 183 states to 183 states and 296 transitions. [2022-07-19 15:04:15,749 INFO L78 Accepts]: Start accepts. Automaton has 183 states and 296 transitions. Word has length 16 [2022-07-19 15:04:15,749 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-19 15:04:15,749 INFO L495 AbstractCegarLoop]: Abstraction has 183 states and 296 transitions. [2022-07-19 15:04:15,749 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 2.6) internal successors, (13), 5 states have internal predecessors, (13), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-07-19 15:04:15,749 INFO L276 IsEmpty]: Start isEmpty. Operand 183 states and 296 transitions. [2022-07-19 15:04:15,750 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-07-19 15:04:15,750 INFO L187 NwaCegarLoop]: Found error trace [2022-07-19 15:04:15,750 INFO L195 NwaCegarLoop]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-19 15:04:15,750 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2022-07-19 15:04:15,750 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-19 15:04:15,750 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 15:04:15,751 INFO L85 PathProgramCache]: Analyzing trace with hash 186914675, now seen corresponding path program 1 times [2022-07-19 15:04:15,751 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 15:04:15,751 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2097519735] [2022-07-19 15:04:15,751 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 15:04:15,751 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 15:04:15,757 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 15:04:15,795 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-07-19 15:04:15,797 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 15:04:15,798 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-07-19 15:04:15,799 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 15:04:15,801 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-07-19 15:04:15,801 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 15:04:15,801 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2097519735] [2022-07-19 15:04:15,801 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2097519735] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-19 15:04:15,801 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-19 15:04:15,801 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-07-19 15:04:15,802 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1461927368] [2022-07-19 15:04:15,802 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-19 15:04:15,802 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-07-19 15:04:15,807 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 15:04:15,807 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-07-19 15:04:15,807 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-07-19 15:04:15,807 INFO L87 Difference]: Start difference. First operand 183 states and 296 transitions. Second operand has 6 states, 6 states have (on average 2.5) internal successors, (15), 5 states have internal predecessors, (15), 1 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2022-07-19 15:04:15,888 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-19 15:04:15,888 INFO L93 Difference]: Finished difference Result 217 states and 348 transitions. [2022-07-19 15:04:15,889 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-07-19 15:04:15,889 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 2.5) internal successors, (15), 5 states have internal predecessors, (15), 1 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 23 [2022-07-19 15:04:15,889 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-19 15:04:15,890 INFO L225 Difference]: With dead ends: 217 [2022-07-19 15:04:15,890 INFO L226 Difference]: Without dead ends: 215 [2022-07-19 15:04:15,891 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2022-07-19 15:04:15,893 INFO L413 NwaCegarLoop]: 70 mSDtfsCounter, 43 mSDsluCounter, 223 mSDsCounter, 0 mSdLazyCounter, 74 mSolverCounterSat, 32 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 57 SdHoareTripleChecker+Valid, 293 SdHoareTripleChecker+Invalid, 106 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 32 IncrementalHoareTripleChecker+Valid, 74 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-19 15:04:15,893 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [57 Valid, 293 Invalid, 106 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [32 Valid, 74 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-19 15:04:15,894 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 215 states. [2022-07-19 15:04:15,916 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 215 to 197. [2022-07-19 15:04:15,917 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 197 states, 96 states have (on average 1.3854166666666667) internal successors, (133), 102 states have internal predecessors, (133), 92 states have call successors, (92), 8 states have call predecessors, (92), 8 states have return successors, (92), 86 states have call predecessors, (92), 92 states have call successors, (92) [2022-07-19 15:04:15,918 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 197 states to 197 states and 317 transitions. [2022-07-19 15:04:15,918 INFO L78 Accepts]: Start accepts. Automaton has 197 states and 317 transitions. Word has length 23 [2022-07-19 15:04:15,919 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-19 15:04:15,919 INFO L495 AbstractCegarLoop]: Abstraction has 197 states and 317 transitions. [2022-07-19 15:04:15,919 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 2.5) internal successors, (15), 5 states have internal predecessors, (15), 1 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2022-07-19 15:04:15,919 INFO L276 IsEmpty]: Start isEmpty. Operand 197 states and 317 transitions. [2022-07-19 15:04:15,920 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2022-07-19 15:04:15,920 INFO L187 NwaCegarLoop]: Found error trace [2022-07-19 15:04:15,920 INFO L195 NwaCegarLoop]: trace histogram [3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-19 15:04:15,920 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2022-07-19 15:04:15,920 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-19 15:04:15,921 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 15:04:15,921 INFO L85 PathProgramCache]: Analyzing trace with hash 768784003, now seen corresponding path program 1 times [2022-07-19 15:04:15,921 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 15:04:15,921 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [261569344] [2022-07-19 15:04:15,921 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 15:04:15,921 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 15:04:15,932 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 15:04:15,959 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-07-19 15:04:15,960 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 15:04:15,961 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-07-19 15:04:15,962 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 15:04:15,963 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-07-19 15:04:15,963 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 15:04:15,963 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [261569344] [2022-07-19 15:04:15,963 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [261569344] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-19 15:04:15,963 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-19 15:04:15,963 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-07-19 15:04:15,963 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [791660309] [2022-07-19 15:04:15,963 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-19 15:04:15,963 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-07-19 15:04:15,963 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 15:04:15,964 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-07-19 15:04:15,964 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-07-19 15:04:15,964 INFO L87 Difference]: Start difference. First operand 197 states and 317 transitions. Second operand has 5 states, 5 states have (on average 3.4) internal successors, (17), 5 states have internal predecessors, (17), 1 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2022-07-19 15:04:16,148 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-19 15:04:16,148 INFO L93 Difference]: Finished difference Result 520 states and 854 transitions. [2022-07-19 15:04:16,148 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-07-19 15:04:16,149 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.4) internal successors, (17), 5 states have internal predecessors, (17), 1 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 25 [2022-07-19 15:04:16,149 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-19 15:04:16,150 INFO L225 Difference]: With dead ends: 520 [2022-07-19 15:04:16,150 INFO L226 Difference]: Without dead ends: 366 [2022-07-19 15:04:16,151 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2022-07-19 15:04:16,151 INFO L413 NwaCegarLoop]: 91 mSDtfsCounter, 76 mSDsluCounter, 45 mSDsCounter, 0 mSdLazyCounter, 124 mSolverCounterSat, 92 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 106 SdHoareTripleChecker+Valid, 136 SdHoareTripleChecker+Invalid, 216 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 92 IncrementalHoareTripleChecker+Valid, 124 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-19 15:04:16,151 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [106 Valid, 136 Invalid, 216 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [92 Valid, 124 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-19 15:04:16,152 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 366 states. [2022-07-19 15:04:16,173 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 366 to 197. [2022-07-19 15:04:16,173 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 197 states, 96 states have (on average 1.3645833333333333) internal successors, (131), 102 states have internal predecessors, (131), 92 states have call successors, (92), 8 states have call predecessors, (92), 8 states have return successors, (92), 86 states have call predecessors, (92), 92 states have call successors, (92) [2022-07-19 15:04:16,174 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 197 states to 197 states and 315 transitions. [2022-07-19 15:04:16,174 INFO L78 Accepts]: Start accepts. Automaton has 197 states and 315 transitions. Word has length 25 [2022-07-19 15:04:16,174 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-19 15:04:16,175 INFO L495 AbstractCegarLoop]: Abstraction has 197 states and 315 transitions. [2022-07-19 15:04:16,175 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 3.4) internal successors, (17), 5 states have internal predecessors, (17), 1 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2022-07-19 15:04:16,175 INFO L276 IsEmpty]: Start isEmpty. Operand 197 states and 315 transitions. [2022-07-19 15:04:16,175 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-07-19 15:04:16,175 INFO L187 NwaCegarLoop]: Found error trace [2022-07-19 15:04:16,175 INFO L195 NwaCegarLoop]: trace histogram [4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-19 15:04:16,175 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2022-07-19 15:04:16,175 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-19 15:04:16,176 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 15:04:16,176 INFO L85 PathProgramCache]: Analyzing trace with hash -299150037, now seen corresponding path program 1 times [2022-07-19 15:04:16,176 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 15:04:16,176 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1858806996] [2022-07-19 15:04:16,176 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 15:04:16,176 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 15:04:16,182 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 15:04:16,202 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-07-19 15:04:16,204 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 15:04:16,205 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-07-19 15:04:16,207 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 15:04:16,208 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2022-07-19 15:04:16,209 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 15:04:16,210 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-07-19 15:04:16,210 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 15:04:16,211 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1858806996] [2022-07-19 15:04:16,211 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1858806996] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-19 15:04:16,211 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-19 15:04:16,211 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-07-19 15:04:16,211 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [547117111] [2022-07-19 15:04:16,211 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-19 15:04:16,211 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-07-19 15:04:16,211 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 15:04:16,212 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-07-19 15:04:16,212 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-07-19 15:04:16,212 INFO L87 Difference]: Start difference. First operand 197 states and 315 transitions. Second operand has 6 states, 5 states have (on average 2.6) internal successors, (13), 5 states have internal predecessors, (13), 1 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2022-07-19 15:04:16,356 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-19 15:04:16,356 INFO L93 Difference]: Finished difference Result 291 states and 471 transitions. [2022-07-19 15:04:16,357 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-07-19 15:04:16,357 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 2.6) internal successors, (13), 5 states have internal predecessors, (13), 1 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) Word has length 26 [2022-07-19 15:04:16,357 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-19 15:04:16,359 INFO L225 Difference]: With dead ends: 291 [2022-07-19 15:04:16,359 INFO L226 Difference]: Without dead ends: 289 [2022-07-19 15:04:16,359 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2022-07-19 15:04:16,360 INFO L413 NwaCegarLoop]: 67 mSDtfsCounter, 24 mSDsluCounter, 116 mSDsCounter, 0 mSdLazyCounter, 153 mSolverCounterSat, 33 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 34 SdHoareTripleChecker+Valid, 183 SdHoareTripleChecker+Invalid, 186 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 33 IncrementalHoareTripleChecker+Valid, 153 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-19 15:04:16,360 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [34 Valid, 183 Invalid, 186 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [33 Valid, 153 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-19 15:04:16,360 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 289 states. [2022-07-19 15:04:16,386 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 289 to 269. [2022-07-19 15:04:16,387 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 269 states, 118 states have (on average 1.3644067796610169) internal successors, (161), 132 states have internal predecessors, (161), 140 states have call successors, (140), 10 states have call predecessors, (140), 10 states have return successors, (140), 126 states have call predecessors, (140), 140 states have call successors, (140) [2022-07-19 15:04:16,389 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 269 states to 269 states and 441 transitions. [2022-07-19 15:04:16,389 INFO L78 Accepts]: Start accepts. Automaton has 269 states and 441 transitions. Word has length 26 [2022-07-19 15:04:16,389 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-19 15:04:16,389 INFO L495 AbstractCegarLoop]: Abstraction has 269 states and 441 transitions. [2022-07-19 15:04:16,389 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 2.6) internal successors, (13), 5 states have internal predecessors, (13), 1 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2022-07-19 15:04:16,389 INFO L276 IsEmpty]: Start isEmpty. Operand 269 states and 441 transitions. [2022-07-19 15:04:16,390 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2022-07-19 15:04:16,390 INFO L187 NwaCegarLoop]: Found error trace [2022-07-19 15:04:16,390 INFO L195 NwaCegarLoop]: trace histogram [4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-19 15:04:16,390 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2022-07-19 15:04:16,390 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-19 15:04:16,391 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 15:04:16,391 INFO L85 PathProgramCache]: Analyzing trace with hash 1714235681, now seen corresponding path program 1 times [2022-07-19 15:04:16,391 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 15:04:16,391 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [586878570] [2022-07-19 15:04:16,391 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 15:04:16,391 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 15:04:16,397 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 15:04:16,440 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-07-19 15:04:16,442 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 15:04:16,444 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-07-19 15:04:16,451 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 15:04:16,454 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2022-07-19 15:04:16,455 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 15:04:16,457 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-07-19 15:04:16,457 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 15:04:16,457 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [586878570] [2022-07-19 15:04:16,457 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [586878570] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-19 15:04:16,457 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-19 15:04:16,457 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-07-19 15:04:16,457 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [914032073] [2022-07-19 15:04:16,458 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-19 15:04:16,458 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-07-19 15:04:16,458 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 15:04:16,458 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-07-19 15:04:16,458 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2022-07-19 15:04:16,458 INFO L87 Difference]: Start difference. First operand 269 states and 441 transitions. Second operand has 7 states, 7 states have (on average 2.142857142857143) internal successors, (15), 6 states have internal predecessors, (15), 1 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2022-07-19 15:04:16,595 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-19 15:04:16,595 INFO L93 Difference]: Finished difference Result 317 states and 516 transitions. [2022-07-19 15:04:16,596 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-07-19 15:04:16,596 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.142857142857143) internal successors, (15), 6 states have internal predecessors, (15), 1 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) Word has length 28 [2022-07-19 15:04:16,596 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-19 15:04:16,600 INFO L225 Difference]: With dead ends: 317 [2022-07-19 15:04:16,600 INFO L226 Difference]: Without dead ends: 315 [2022-07-19 15:04:16,600 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2022-07-19 15:04:16,601 INFO L413 NwaCegarLoop]: 60 mSDtfsCounter, 71 mSDsluCounter, 137 mSDsCounter, 0 mSdLazyCounter, 111 mSolverCounterSat, 76 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 71 SdHoareTripleChecker+Valid, 197 SdHoareTripleChecker+Invalid, 187 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 76 IncrementalHoareTripleChecker+Valid, 111 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-19 15:04:16,601 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [71 Valid, 197 Invalid, 187 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [76 Valid, 111 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-19 15:04:16,602 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 315 states. [2022-07-19 15:04:16,631 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 315 to 287. [2022-07-19 15:04:16,632 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 287 states, 125 states have (on average 1.36) internal successors, (170), 141 states have internal predecessors, (170), 150 states have call successors, (150), 11 states have call predecessors, (150), 11 states have return successors, (150), 134 states have call predecessors, (150), 150 states have call successors, (150) [2022-07-19 15:04:16,634 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 287 states to 287 states and 470 transitions. [2022-07-19 15:04:16,635 INFO L78 Accepts]: Start accepts. Automaton has 287 states and 470 transitions. Word has length 28 [2022-07-19 15:04:16,635 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-19 15:04:16,635 INFO L495 AbstractCegarLoop]: Abstraction has 287 states and 470 transitions. [2022-07-19 15:04:16,635 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 2.142857142857143) internal successors, (15), 6 states have internal predecessors, (15), 1 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2022-07-19 15:04:16,635 INFO L276 IsEmpty]: Start isEmpty. Operand 287 states and 470 transitions. [2022-07-19 15:04:16,637 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2022-07-19 15:04:16,637 INFO L187 NwaCegarLoop]: Found error trace [2022-07-19 15:04:16,637 INFO L195 NwaCegarLoop]: trace histogram [6, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-19 15:04:16,637 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2022-07-19 15:04:16,637 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-19 15:04:16,638 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 15:04:16,638 INFO L85 PathProgramCache]: Analyzing trace with hash 523331784, now seen corresponding path program 1 times [2022-07-19 15:04:16,638 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 15:04:16,638 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [979746800] [2022-07-19 15:04:16,638 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 15:04:16,638 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 15:04:16,651 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 15:04:16,683 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-07-19 15:04:16,685 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 15:04:16,686 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-07-19 15:04:16,687 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 15:04:16,692 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2022-07-19 15:04:16,694 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 15:04:16,697 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2022-07-19 15:04:16,699 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 15:04:16,701 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 29 [2022-07-19 15:04:16,702 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 15:04:16,707 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 10 proven. 0 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2022-07-19 15:04:16,707 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 15:04:16,707 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [979746800] [2022-07-19 15:04:16,707 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [979746800] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-19 15:04:16,708 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-19 15:04:16,708 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-07-19 15:04:16,708 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [618098744] [2022-07-19 15:04:16,708 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-19 15:04:16,708 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-07-19 15:04:16,708 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 15:04:16,709 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-07-19 15:04:16,709 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2022-07-19 15:04:16,709 INFO L87 Difference]: Start difference. First operand 287 states and 470 transitions. Second operand has 7 states, 6 states have (on average 2.5) internal successors, (15), 6 states have internal predecessors, (15), 2 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2022-07-19 15:04:16,861 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-19 15:04:16,862 INFO L93 Difference]: Finished difference Result 329 states and 527 transitions. [2022-07-19 15:04:16,862 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-07-19 15:04:16,862 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 2.5) internal successors, (15), 6 states have internal predecessors, (15), 2 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 38 [2022-07-19 15:04:16,862 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-19 15:04:16,864 INFO L225 Difference]: With dead ends: 329 [2022-07-19 15:04:16,864 INFO L226 Difference]: Without dead ends: 327 [2022-07-19 15:04:16,864 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2022-07-19 15:04:16,865 INFO L413 NwaCegarLoop]: 67 mSDtfsCounter, 34 mSDsluCounter, 127 mSDsCounter, 0 mSdLazyCounter, 210 mSolverCounterSat, 60 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 38 SdHoareTripleChecker+Valid, 194 SdHoareTripleChecker+Invalid, 270 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 60 IncrementalHoareTripleChecker+Valid, 210 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-19 15:04:16,865 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [38 Valid, 194 Invalid, 270 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [60 Valid, 210 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-19 15:04:16,866 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 327 states. [2022-07-19 15:04:16,892 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 327 to 291. [2022-07-19 15:04:16,893 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 291 states, 128 states have (on average 1.3515625) internal successors, (173), 144 states have internal predecessors, (173), 150 states have call successors, (150), 12 states have call predecessors, (150), 12 states have return successors, (150), 134 states have call predecessors, (150), 150 states have call successors, (150) [2022-07-19 15:04:16,894 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 291 states to 291 states and 473 transitions. [2022-07-19 15:04:16,895 INFO L78 Accepts]: Start accepts. Automaton has 291 states and 473 transitions. Word has length 38 [2022-07-19 15:04:16,896 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-19 15:04:16,896 INFO L495 AbstractCegarLoop]: Abstraction has 291 states and 473 transitions. [2022-07-19 15:04:16,896 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 2.5) internal successors, (15), 6 states have internal predecessors, (15), 2 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2022-07-19 15:04:16,896 INFO L276 IsEmpty]: Start isEmpty. Operand 291 states and 473 transitions. [2022-07-19 15:04:16,898 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2022-07-19 15:04:16,898 INFO L187 NwaCegarLoop]: Found error trace [2022-07-19 15:04:16,898 INFO L195 NwaCegarLoop]: trace histogram [5, 4, 4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-19 15:04:16,898 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2022-07-19 15:04:16,898 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-19 15:04:16,899 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 15:04:16,899 INFO L85 PathProgramCache]: Analyzing trace with hash 1856149802, now seen corresponding path program 1 times [2022-07-19 15:04:16,899 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 15:04:16,899 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1932252132] [2022-07-19 15:04:16,899 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 15:04:16,899 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 15:04:16,910 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 15:04:16,933 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-07-19 15:04:16,933 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 15:04:16,934 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-07-19 15:04:16,935 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 15:04:16,937 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2022-07-19 15:04:16,938 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 15:04:16,939 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 25 [2022-07-19 15:04:16,942 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 15:04:16,943 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 11 proven. 0 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2022-07-19 15:04:16,943 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 15:04:16,943 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1932252132] [2022-07-19 15:04:16,944 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1932252132] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-19 15:04:16,944 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-19 15:04:16,944 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-07-19 15:04:16,944 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1920680872] [2022-07-19 15:04:16,944 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-19 15:04:16,945 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-07-19 15:04:16,945 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 15:04:16,945 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-07-19 15:04:16,945 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2022-07-19 15:04:16,946 INFO L87 Difference]: Start difference. First operand 291 states and 473 transitions. Second operand has 7 states, 7 states have (on average 2.857142857142857) internal successors, (20), 6 states have internal predecessors, (20), 3 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2022-07-19 15:04:17,047 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-19 15:04:17,048 INFO L93 Difference]: Finished difference Result 297 states and 478 transitions. [2022-07-19 15:04:17,048 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-07-19 15:04:17,048 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.857142857142857) internal successors, (20), 6 states have internal predecessors, (20), 3 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) Word has length 38 [2022-07-19 15:04:17,049 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-19 15:04:17,050 INFO L225 Difference]: With dead ends: 297 [2022-07-19 15:04:17,050 INFO L226 Difference]: Without dead ends: 295 [2022-07-19 15:04:17,051 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2022-07-19 15:04:17,051 INFO L413 NwaCegarLoop]: 35 mSDtfsCounter, 29 mSDsluCounter, 68 mSDsCounter, 0 mSdLazyCounter, 126 mSolverCounterSat, 40 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 29 SdHoareTripleChecker+Valid, 103 SdHoareTripleChecker+Invalid, 166 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 40 IncrementalHoareTripleChecker+Valid, 126 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-19 15:04:17,051 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [29 Valid, 103 Invalid, 166 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [40 Valid, 126 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-19 15:04:17,052 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 295 states. [2022-07-19 15:04:17,081 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 295 to 295. [2022-07-19 15:04:17,082 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 295 states, 131 states have (on average 1.3435114503816794) internal successors, (176), 147 states have internal predecessors, (176), 150 states have call successors, (150), 13 states have call predecessors, (150), 13 states have return successors, (150), 134 states have call predecessors, (150), 150 states have call successors, (150) [2022-07-19 15:04:17,083 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 295 states to 295 states and 476 transitions. [2022-07-19 15:04:17,084 INFO L78 Accepts]: Start accepts. Automaton has 295 states and 476 transitions. Word has length 38 [2022-07-19 15:04:17,084 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-19 15:04:17,084 INFO L495 AbstractCegarLoop]: Abstraction has 295 states and 476 transitions. [2022-07-19 15:04:17,084 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 2.857142857142857) internal successors, (20), 6 states have internal predecessors, (20), 3 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2022-07-19 15:04:17,085 INFO L276 IsEmpty]: Start isEmpty. Operand 295 states and 476 transitions. [2022-07-19 15:04:17,085 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2022-07-19 15:04:17,085 INFO L187 NwaCegarLoop]: Found error trace [2022-07-19 15:04:17,085 INFO L195 NwaCegarLoop]: trace histogram [7, 6, 6, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-19 15:04:17,086 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2022-07-19 15:04:17,086 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-19 15:04:17,086 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 15:04:17,086 INFO L85 PathProgramCache]: Analyzing trace with hash 2019762676, now seen corresponding path program 1 times [2022-07-19 15:04:17,086 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 15:04:17,086 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1426858088] [2022-07-19 15:04:17,086 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 15:04:17,087 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 15:04:17,106 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 15:04:17,129 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-07-19 15:04:17,129 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 15:04:17,130 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-07-19 15:04:17,131 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 15:04:17,131 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2022-07-19 15:04:17,132 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 15:04:17,133 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 25 [2022-07-19 15:04:17,134 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 15:04:17,135 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 34 [2022-07-19 15:04:17,135 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 15:04:17,136 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2022-07-19 15:04:17,137 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 15:04:17,137 INFO L134 CoverageAnalysis]: Checked inductivity of 79 backedges. 19 proven. 0 refuted. 0 times theorem prover too weak. 60 trivial. 0 not checked. [2022-07-19 15:04:17,138 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 15:04:17,138 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1426858088] [2022-07-19 15:04:17,138 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1426858088] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-19 15:04:17,138 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-19 15:04:17,138 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-07-19 15:04:17,138 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1743482780] [2022-07-19 15:04:17,138 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-19 15:04:17,138 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-07-19 15:04:17,138 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 15:04:17,138 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-07-19 15:04:17,139 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2022-07-19 15:04:17,139 INFO L87 Difference]: Start difference. First operand 295 states and 476 transitions. Second operand has 7 states, 7 states have (on average 3.142857142857143) internal successors, (22), 6 states have internal predecessors, (22), 3 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (6), 3 states have call predecessors, (6), 3 states have call successors, (6) [2022-07-19 15:04:17,260 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-19 15:04:17,261 INFO L93 Difference]: Finished difference Result 329 states and 525 transitions. [2022-07-19 15:04:17,261 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-07-19 15:04:17,261 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 3.142857142857143) internal successors, (22), 6 states have internal predecessors, (22), 3 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (6), 3 states have call predecessors, (6), 3 states have call successors, (6) Word has length 50 [2022-07-19 15:04:17,261 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-19 15:04:17,263 INFO L225 Difference]: With dead ends: 329 [2022-07-19 15:04:17,263 INFO L226 Difference]: Without dead ends: 327 [2022-07-19 15:04:17,264 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2022-07-19 15:04:17,266 INFO L413 NwaCegarLoop]: 60 mSDtfsCounter, 42 mSDsluCounter, 183 mSDsCounter, 0 mSdLazyCounter, 106 mSolverCounterSat, 34 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 54 SdHoareTripleChecker+Valid, 243 SdHoareTripleChecker+Invalid, 140 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 34 IncrementalHoareTripleChecker+Valid, 106 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-19 15:04:17,266 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [54 Valid, 243 Invalid, 140 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [34 Valid, 106 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-19 15:04:17,266 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 327 states. [2022-07-19 15:04:17,292 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 327 to 174. [2022-07-19 15:04:17,293 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 174 states, 85 states have (on average 1.2705882352941176) internal successors, (108), 93 states have internal predecessors, (108), 76 states have call successors, (76), 12 states have call predecessors, (76), 12 states have return successors, (76), 68 states have call predecessors, (76), 76 states have call successors, (76) [2022-07-19 15:04:17,294 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 174 states to 174 states and 260 transitions. [2022-07-19 15:04:17,294 INFO L78 Accepts]: Start accepts. Automaton has 174 states and 260 transitions. Word has length 50 [2022-07-19 15:04:17,294 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-19 15:04:17,294 INFO L495 AbstractCegarLoop]: Abstraction has 174 states and 260 transitions. [2022-07-19 15:04:17,294 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 3.142857142857143) internal successors, (22), 6 states have internal predecessors, (22), 3 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (6), 3 states have call predecessors, (6), 3 states have call successors, (6) [2022-07-19 15:04:17,294 INFO L276 IsEmpty]: Start isEmpty. Operand 174 states and 260 transitions. [2022-07-19 15:04:17,295 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2022-07-19 15:04:17,296 INFO L187 NwaCegarLoop]: Found error trace [2022-07-19 15:04:17,296 INFO L195 NwaCegarLoop]: trace histogram [9, 8, 8, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-19 15:04:17,296 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2022-07-19 15:04:17,296 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-19 15:04:17,296 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 15:04:17,296 INFO L85 PathProgramCache]: Analyzing trace with hash -2077570128, now seen corresponding path program 1 times [2022-07-19 15:04:17,297 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 15:04:17,297 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1849081686] [2022-07-19 15:04:17,297 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 15:04:17,297 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 15:04:17,307 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 15:04:17,329 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-07-19 15:04:17,331 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 15:04:17,332 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-07-19 15:04:17,333 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 15:04:17,336 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2022-07-19 15:04:17,338 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 15:04:17,340 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2022-07-19 15:04:17,341 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 15:04:17,342 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 29 [2022-07-19 15:04:17,343 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 15:04:17,344 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 34 [2022-07-19 15:04:17,345 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 15:04:17,346 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 42 [2022-07-19 15:04:17,346 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 15:04:17,347 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 47 [2022-07-19 15:04:17,347 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 15:04:17,350 INFO L134 CoverageAnalysis]: Checked inductivity of 135 backedges. 22 proven. 1 refuted. 0 times theorem prover too weak. 112 trivial. 0 not checked. [2022-07-19 15:04:17,350 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 15:04:17,351 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1849081686] [2022-07-19 15:04:17,351 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1849081686] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-19 15:04:17,351 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1396895052] [2022-07-19 15:04:17,351 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 15:04:17,352 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 15:04:17,352 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-19 15:04:17,355 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-19 15:04:17,356 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-07-19 15:04:17,395 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 15:04:17,397 INFO L263 TraceCheckSpWp]: Trace formula consists of 146 conjuncts, 6 conjunts are in the unsatisfiable core [2022-07-19 15:04:17,401 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-19 15:04:17,620 INFO L134 CoverageAnalysis]: Checked inductivity of 135 backedges. 67 proven. 0 refuted. 0 times theorem prover too weak. 68 trivial. 0 not checked. [2022-07-19 15:04:17,620 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-19 15:04:17,621 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1396895052] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-19 15:04:17,621 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-07-19 15:04:17,621 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [5] total 9 [2022-07-19 15:04:17,621 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [247870052] [2022-07-19 15:04:17,621 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-19 15:04:17,621 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-07-19 15:04:17,621 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 15:04:17,622 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-07-19 15:04:17,622 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2022-07-19 15:04:17,622 INFO L87 Difference]: Start difference. First operand 174 states and 260 transitions. Second operand has 6 states, 6 states have (on average 3.6666666666666665) internal successors, (22), 6 states have internal predecessors, (22), 2 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) [2022-07-19 15:04:17,842 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-19 15:04:17,843 INFO L93 Difference]: Finished difference Result 505 states and 801 transitions. [2022-07-19 15:04:17,843 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-07-19 15:04:17,843 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 3.6666666666666665) internal successors, (22), 6 states have internal predecessors, (22), 2 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) Word has length 58 [2022-07-19 15:04:17,843 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-19 15:04:17,845 INFO L225 Difference]: With dead ends: 505 [2022-07-19 15:04:17,845 INFO L226 Difference]: Without dead ends: 335 [2022-07-19 15:04:17,846 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 81 GetRequests, 71 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=42, Invalid=90, Unknown=0, NotChecked=0, Total=132 [2022-07-19 15:04:17,846 INFO L413 NwaCegarLoop]: 73 mSDtfsCounter, 35 mSDsluCounter, 98 mSDsCounter, 0 mSdLazyCounter, 136 mSolverCounterSat, 75 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 37 SdHoareTripleChecker+Valid, 171 SdHoareTripleChecker+Invalid, 211 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 75 IncrementalHoareTripleChecker+Valid, 136 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-19 15:04:17,846 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [37 Valid, 171 Invalid, 211 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [75 Valid, 136 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-19 15:04:17,847 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 335 states. [2022-07-19 15:04:17,893 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 335 to 311. [2022-07-19 15:04:17,893 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 311 states, 136 states have (on average 1.3455882352941178) internal successors, (183), 152 states have internal predecessors, (183), 162 states have call successors, (162), 12 states have call predecessors, (162), 12 states have return successors, (162), 146 states have call predecessors, (162), 162 states have call successors, (162) [2022-07-19 15:04:17,895 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 311 states to 311 states and 507 transitions. [2022-07-19 15:04:17,895 INFO L78 Accepts]: Start accepts. Automaton has 311 states and 507 transitions. Word has length 58 [2022-07-19 15:04:17,895 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-19 15:04:17,895 INFO L495 AbstractCegarLoop]: Abstraction has 311 states and 507 transitions. [2022-07-19 15:04:17,895 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 3.6666666666666665) internal successors, (22), 6 states have internal predecessors, (22), 2 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) [2022-07-19 15:04:17,896 INFO L276 IsEmpty]: Start isEmpty. Operand 311 states and 507 transitions. [2022-07-19 15:04:17,897 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2022-07-19 15:04:17,897 INFO L187 NwaCegarLoop]: Found error trace [2022-07-19 15:04:17,897 INFO L195 NwaCegarLoop]: trace histogram [13, 12, 12, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-19 15:04:17,916 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-07-19 15:04:18,111 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2022-07-19 15:04:18,112 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-19 15:04:18,112 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 15:04:18,112 INFO L85 PathProgramCache]: Analyzing trace with hash -1244619342, now seen corresponding path program 1 times [2022-07-19 15:04:18,112 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 15:04:18,112 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1355159357] [2022-07-19 15:04:18,112 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 15:04:18,112 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 15:04:18,119 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 15:04:18,149 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-07-19 15:04:18,150 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 15:04:18,152 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-07-19 15:04:18,152 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 15:04:18,153 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2022-07-19 15:04:18,154 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 15:04:18,155 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2022-07-19 15:04:18,156 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 15:04:18,157 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 29 [2022-07-19 15:04:18,158 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 15:04:18,159 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 34 [2022-07-19 15:04:18,161 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 15:04:18,164 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 41 [2022-07-19 15:04:18,165 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 15:04:18,169 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 46 [2022-07-19 15:04:18,171 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 15:04:18,172 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 51 [2022-07-19 15:04:18,174 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 15:04:18,175 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 56 [2022-07-19 15:04:18,176 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 15:04:18,179 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 64 [2022-07-19 15:04:18,180 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 15:04:18,181 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 69 [2022-07-19 15:04:18,183 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 15:04:18,185 INFO L134 CoverageAnalysis]: Checked inductivity of 295 backedges. 24 proven. 7 refuted. 0 times theorem prover too weak. 264 trivial. 0 not checked. [2022-07-19 15:04:18,185 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 15:04:18,185 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1355159357] [2022-07-19 15:04:18,185 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1355159357] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-19 15:04:18,185 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [885181680] [2022-07-19 15:04:18,185 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 15:04:18,185 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 15:04:18,185 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-19 15:04:18,186 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-19 15:04:18,215 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-07-19 15:04:18,240 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 15:04:18,242 INFO L263 TraceCheckSpWp]: Trace formula consists of 187 conjuncts, 9 conjunts are in the unsatisfiable core [2022-07-19 15:04:18,248 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-19 15:04:18,578 INFO L134 CoverageAnalysis]: Checked inductivity of 295 backedges. 107 proven. 0 refuted. 0 times theorem prover too weak. 188 trivial. 0 not checked. [2022-07-19 15:04:18,579 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-19 15:04:18,579 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [885181680] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-19 15:04:18,579 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-07-19 15:04:18,579 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [7] total 12 [2022-07-19 15:04:18,579 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1470813034] [2022-07-19 15:04:18,579 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-19 15:04:18,580 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-07-19 15:04:18,580 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 15:04:18,580 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-07-19 15:04:18,580 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=107, Unknown=0, NotChecked=0, Total=132 [2022-07-19 15:04:18,580 INFO L87 Difference]: Start difference. First operand 311 states and 507 transitions. Second operand has 7 states, 7 states have (on average 3.4285714285714284) internal successors, (24), 7 states have internal predecessors, (24), 3 states have call successors, (13), 2 states have call predecessors, (13), 2 states have return successors, (12), 3 states have call predecessors, (12), 3 states have call successors, (12) [2022-07-19 15:04:18,850 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-19 15:04:18,851 INFO L93 Difference]: Finished difference Result 579 states and 926 transitions. [2022-07-19 15:04:18,851 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-07-19 15:04:18,851 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 3.4285714285714284) internal successors, (24), 7 states have internal predecessors, (24), 3 states have call successors, (13), 2 states have call predecessors, (13), 2 states have return successors, (12), 3 states have call predecessors, (12), 3 states have call successors, (12) Word has length 80 [2022-07-19 15:04:18,851 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-19 15:04:18,853 INFO L225 Difference]: With dead ends: 579 [2022-07-19 15:04:18,853 INFO L226 Difference]: Without dead ends: 303 [2022-07-19 15:04:18,854 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 113 GetRequests, 100 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=43, Invalid=167, Unknown=0, NotChecked=0, Total=210 [2022-07-19 15:04:18,854 INFO L413 NwaCegarLoop]: 86 mSDtfsCounter, 29 mSDsluCounter, 103 mSDsCounter, 0 mSdLazyCounter, 236 mSolverCounterSat, 69 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 29 SdHoareTripleChecker+Valid, 189 SdHoareTripleChecker+Invalid, 305 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 69 IncrementalHoareTripleChecker+Valid, 236 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-07-19 15:04:18,855 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [29 Valid, 189 Invalid, 305 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [69 Valid, 236 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-07-19 15:04:18,855 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 303 states. [2022-07-19 15:04:18,895 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 303 to 267. [2022-07-19 15:04:18,896 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 267 states, 124 states have (on average 1.314516129032258) internal successors, (163), 136 states have internal predecessors, (163), 130 states have call successors, (130), 12 states have call predecessors, (130), 12 states have return successors, (130), 118 states have call predecessors, (130), 130 states have call successors, (130) [2022-07-19 15:04:18,897 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 267 states to 267 states and 423 transitions. [2022-07-19 15:04:18,898 INFO L78 Accepts]: Start accepts. Automaton has 267 states and 423 transitions. Word has length 80 [2022-07-19 15:04:18,899 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-19 15:04:18,899 INFO L495 AbstractCegarLoop]: Abstraction has 267 states and 423 transitions. [2022-07-19 15:04:18,899 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 3.4285714285714284) internal successors, (24), 7 states have internal predecessors, (24), 3 states have call successors, (13), 2 states have call predecessors, (13), 2 states have return successors, (12), 3 states have call predecessors, (12), 3 states have call successors, (12) [2022-07-19 15:04:18,899 INFO L276 IsEmpty]: Start isEmpty. Operand 267 states and 423 transitions. [2022-07-19 15:04:18,901 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2022-07-19 15:04:18,901 INFO L187 NwaCegarLoop]: Found error trace [2022-07-19 15:04:18,901 INFO L195 NwaCegarLoop]: trace histogram [13, 12, 12, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-19 15:04:18,920 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-07-19 15:04:19,115 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2022-07-19 15:04:19,115 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-19 15:04:19,116 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 15:04:19,116 INFO L85 PathProgramCache]: Analyzing trace with hash 293720688, now seen corresponding path program 1 times [2022-07-19 15:04:19,116 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 15:04:19,116 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1555781064] [2022-07-19 15:04:19,116 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 15:04:19,116 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 15:04:19,123 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 15:04:19,148 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-07-19 15:04:19,149 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 15:04:19,150 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-07-19 15:04:19,151 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 15:04:19,152 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2022-07-19 15:04:19,152 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 15:04:19,153 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2022-07-19 15:04:19,153 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 15:04:19,154 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 29 [2022-07-19 15:04:19,155 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 15:04:19,155 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 34 [2022-07-19 15:04:19,156 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 15:04:19,156 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 41 [2022-07-19 15:04:19,157 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 15:04:19,158 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 46 [2022-07-19 15:04:19,158 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 15:04:19,159 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 51 [2022-07-19 15:04:19,159 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 15:04:19,160 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 56 [2022-07-19 15:04:19,161 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 15:04:19,161 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 64 [2022-07-19 15:04:19,162 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 15:04:19,163 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 69 [2022-07-19 15:04:19,163 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 15:04:19,165 INFO L134 CoverageAnalysis]: Checked inductivity of 295 backedges. 24 proven. 7 refuted. 0 times theorem prover too weak. 264 trivial. 0 not checked. [2022-07-19 15:04:19,165 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 15:04:19,165 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1555781064] [2022-07-19 15:04:19,165 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1555781064] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-19 15:04:19,165 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1765182186] [2022-07-19 15:04:19,165 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 15:04:19,165 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 15:04:19,166 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-19 15:04:19,167 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-19 15:04:19,176 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-07-19 15:04:19,211 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 15:04:19,212 INFO L263 TraceCheckSpWp]: Trace formula consists of 186 conjuncts, 8 conjunts are in the unsatisfiable core [2022-07-19 15:04:19,220 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-19 15:04:19,429 INFO L134 CoverageAnalysis]: Checked inductivity of 295 backedges. 107 proven. 0 refuted. 0 times theorem prover too weak. 188 trivial. 0 not checked. [2022-07-19 15:04:19,429 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-19 15:04:19,429 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1765182186] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-19 15:04:19,429 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-07-19 15:04:19,429 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [7] total 11 [2022-07-19 15:04:19,429 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1503462457] [2022-07-19 15:04:19,430 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-19 15:04:19,430 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-07-19 15:04:19,430 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 15:04:19,430 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-07-19 15:04:19,430 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=89, Unknown=0, NotChecked=0, Total=110 [2022-07-19 15:04:19,430 INFO L87 Difference]: Start difference. First operand 267 states and 423 transitions. Second operand has 6 states, 6 states have (on average 4.0) internal successors, (24), 6 states have internal predecessors, (24), 2 states have call successors, (13), 2 states have call predecessors, (13), 2 states have return successors, (12), 2 states have call predecessors, (12), 2 states have call successors, (12) [2022-07-19 15:04:19,609 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-19 15:04:19,610 INFO L93 Difference]: Finished difference Result 497 states and 780 transitions. [2022-07-19 15:04:19,610 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-07-19 15:04:19,610 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 4.0) internal successors, (24), 6 states have internal predecessors, (24), 2 states have call successors, (13), 2 states have call predecessors, (13), 2 states have return successors, (12), 2 states have call predecessors, (12), 2 states have call successors, (12) Word has length 80 [2022-07-19 15:04:19,610 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-19 15:04:19,611 INFO L225 Difference]: With dead ends: 497 [2022-07-19 15:04:19,612 INFO L226 Difference]: Without dead ends: 221 [2022-07-19 15:04:19,612 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 112 GetRequests, 101 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=31, Invalid=125, Unknown=0, NotChecked=0, Total=156 [2022-07-19 15:04:19,613 INFO L413 NwaCegarLoop]: 63 mSDtfsCounter, 20 mSDsluCounter, 113 mSDsCounter, 0 mSdLazyCounter, 181 mSolverCounterSat, 36 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 20 SdHoareTripleChecker+Valid, 176 SdHoareTripleChecker+Invalid, 217 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 36 IncrementalHoareTripleChecker+Valid, 181 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-19 15:04:19,613 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [20 Valid, 176 Invalid, 217 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [36 Valid, 181 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-19 15:04:19,614 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 221 states. [2022-07-19 15:04:19,645 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 221 to 210. [2022-07-19 15:04:19,645 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 210 states, 99 states have (on average 1.2828282828282829) internal successors, (127), 109 states have internal predecessors, (127), 98 states have call successors, (98), 12 states have call predecessors, (98), 12 states have return successors, (98), 88 states have call predecessors, (98), 98 states have call successors, (98) [2022-07-19 15:04:19,646 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 210 states to 210 states and 323 transitions. [2022-07-19 15:04:19,647 INFO L78 Accepts]: Start accepts. Automaton has 210 states and 323 transitions. Word has length 80 [2022-07-19 15:04:19,647 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-19 15:04:19,647 INFO L495 AbstractCegarLoop]: Abstraction has 210 states and 323 transitions. [2022-07-19 15:04:19,647 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 4.0) internal successors, (24), 6 states have internal predecessors, (24), 2 states have call successors, (13), 2 states have call predecessors, (13), 2 states have return successors, (12), 2 states have call predecessors, (12), 2 states have call successors, (12) [2022-07-19 15:04:19,647 INFO L276 IsEmpty]: Start isEmpty. Operand 210 states and 323 transitions. [2022-07-19 15:04:19,648 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 86 [2022-07-19 15:04:19,648 INFO L187 NwaCegarLoop]: Found error trace [2022-07-19 15:04:19,648 INFO L195 NwaCegarLoop]: trace histogram [13, 12, 12, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-19 15:04:19,667 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-07-19 15:04:19,859 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2022-07-19 15:04:19,859 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-19 15:04:19,860 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 15:04:19,860 INFO L85 PathProgramCache]: Analyzing trace with hash -493164145, now seen corresponding path program 1 times [2022-07-19 15:04:19,860 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 15:04:19,860 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [751746865] [2022-07-19 15:04:19,860 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 15:04:19,860 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 15:04:19,867 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 15:04:19,883 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-07-19 15:04:19,884 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 15:04:19,885 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-07-19 15:04:19,886 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 15:04:19,888 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2022-07-19 15:04:19,888 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 15:04:19,889 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 25 [2022-07-19 15:04:19,890 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 15:04:19,891 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 34 [2022-07-19 15:04:19,891 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 15:04:19,892 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2022-07-19 15:04:19,893 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 15:04:19,896 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 46 [2022-07-19 15:04:19,896 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 15:04:19,897 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 51 [2022-07-19 15:04:19,898 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 15:04:19,898 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 56 [2022-07-19 15:04:19,899 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 15:04:19,900 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 61 [2022-07-19 15:04:19,900 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 15:04:19,901 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 69 [2022-07-19 15:04:19,901 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 15:04:19,902 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 74 [2022-07-19 15:04:19,902 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 15:04:19,903 INFO L134 CoverageAnalysis]: Checked inductivity of 308 backedges. 36 proven. 6 refuted. 0 times theorem prover too weak. 266 trivial. 0 not checked. [2022-07-19 15:04:19,903 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 15:04:19,903 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [751746865] [2022-07-19 15:04:19,903 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [751746865] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-19 15:04:19,903 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1743644035] [2022-07-19 15:04:19,903 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 15:04:19,903 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 15:04:19,903 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-19 15:04:19,916 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-19 15:04:19,950 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-07-19 15:04:19,960 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 15:04:19,961 INFO L263 TraceCheckSpWp]: Trace formula consists of 195 conjuncts, 5 conjunts are in the unsatisfiable core [2022-07-19 15:04:19,966 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-19 15:04:20,010 INFO L134 CoverageAnalysis]: Checked inductivity of 308 backedges. 149 proven. 2 refuted. 0 times theorem prover too weak. 157 trivial. 0 not checked. [2022-07-19 15:04:20,010 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-19 15:04:20,102 INFO L134 CoverageAnalysis]: Checked inductivity of 308 backedges. 37 proven. 2 refuted. 0 times theorem prover too weak. 269 trivial. 0 not checked. [2022-07-19 15:04:20,102 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1743644035] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-19 15:04:20,102 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-19 15:04:20,102 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 6, 6] total 13 [2022-07-19 15:04:20,103 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [81962921] [2022-07-19 15:04:20,103 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-19 15:04:20,103 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-07-19 15:04:20,103 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 15:04:20,103 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-07-19 15:04:20,104 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=125, Unknown=0, NotChecked=0, Total=156 [2022-07-19 15:04:20,104 INFO L87 Difference]: Start difference. First operand 210 states and 323 transitions. Second operand has 13 states, 13 states have (on average 3.8461538461538463) internal successors, (50), 13 states have internal predecessors, (50), 5 states have call successors, (30), 2 states have call predecessors, (30), 2 states have return successors, (30), 5 states have call predecessors, (30), 5 states have call successors, (30) [2022-07-19 15:04:21,196 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-19 15:04:21,196 INFO L93 Difference]: Finished difference Result 512 states and 779 transitions. [2022-07-19 15:04:21,197 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2022-07-19 15:04:21,197 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 3.8461538461538463) internal successors, (50), 13 states have internal predecessors, (50), 5 states have call successors, (30), 2 states have call predecessors, (30), 2 states have return successors, (30), 5 states have call predecessors, (30), 5 states have call successors, (30) Word has length 85 [2022-07-19 15:04:21,197 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-19 15:04:21,199 INFO L225 Difference]: With dead ends: 512 [2022-07-19 15:04:21,199 INFO L226 Difference]: Without dead ends: 342 [2022-07-19 15:04:21,199 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 225 GetRequests, 186 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 399 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=419, Invalid=1221, Unknown=0, NotChecked=0, Total=1640 [2022-07-19 15:04:21,200 INFO L413 NwaCegarLoop]: 231 mSDtfsCounter, 192 mSDsluCounter, 202 mSDsCounter, 0 mSdLazyCounter, 1110 mSolverCounterSat, 644 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 192 SdHoareTripleChecker+Valid, 433 SdHoareTripleChecker+Invalid, 1754 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 644 IncrementalHoareTripleChecker+Valid, 1110 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-07-19 15:04:21,200 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [192 Valid, 433 Invalid, 1754 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [644 Valid, 1110 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-07-19 15:04:21,200 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 342 states. [2022-07-19 15:04:21,245 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 342 to 228. [2022-07-19 15:04:21,246 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 228 states, 109 states have (on average 1.2568807339449541) internal successors, (137), 118 states have internal predecessors, (137), 106 states have call successors, (106), 12 states have call predecessors, (106), 12 states have return successors, (106), 97 states have call predecessors, (106), 106 states have call successors, (106) [2022-07-19 15:04:21,247 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 228 states to 228 states and 349 transitions. [2022-07-19 15:04:21,247 INFO L78 Accepts]: Start accepts. Automaton has 228 states and 349 transitions. Word has length 85 [2022-07-19 15:04:21,248 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-19 15:04:21,248 INFO L495 AbstractCegarLoop]: Abstraction has 228 states and 349 transitions. [2022-07-19 15:04:21,248 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 3.8461538461538463) internal successors, (50), 13 states have internal predecessors, (50), 5 states have call successors, (30), 2 states have call predecessors, (30), 2 states have return successors, (30), 5 states have call predecessors, (30), 5 states have call successors, (30) [2022-07-19 15:04:21,248 INFO L276 IsEmpty]: Start isEmpty. Operand 228 states and 349 transitions. [2022-07-19 15:04:21,249 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 108 [2022-07-19 15:04:21,249 INFO L187 NwaCegarLoop]: Found error trace [2022-07-19 15:04:21,249 INFO L195 NwaCegarLoop]: trace histogram [17, 16, 16, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-19 15:04:21,271 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2022-07-19 15:04:21,463 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 15:04:21,463 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-19 15:04:21,464 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 15:04:21,464 INFO L85 PathProgramCache]: Analyzing trace with hash -539919791, now seen corresponding path program 1 times [2022-07-19 15:04:21,464 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 15:04:21,464 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [631995026] [2022-07-19 15:04:21,464 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 15:04:21,464 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 15:04:21,471 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 15:04:21,525 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-07-19 15:04:21,526 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 15:04:21,527 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-07-19 15:04:21,527 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 15:04:21,530 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2022-07-19 15:04:21,530 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 15:04:21,531 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 25 [2022-07-19 15:04:21,532 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 15:04:21,533 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 34 [2022-07-19 15:04:21,533 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 15:04:21,534 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2022-07-19 15:04:21,535 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 15:04:21,535 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 44 [2022-07-19 15:04:21,536 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 15:04:21,536 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 49 [2022-07-19 15:04:21,538 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 15:04:21,538 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 56 [2022-07-19 15:04:21,539 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 15:04:21,540 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 61 [2022-07-19 15:04:21,542 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 15:04:21,542 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 68 [2022-07-19 15:04:21,543 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 15:04:21,544 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 73 [2022-07-19 15:04:21,544 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 15:04:21,545 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 78 [2022-07-19 15:04:21,545 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 15:04:21,546 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 83 [2022-07-19 15:04:21,547 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 15:04:21,548 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 91 [2022-07-19 15:04:21,548 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 15:04:21,549 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 96 [2022-07-19 15:04:21,550 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 15:04:21,551 INFO L134 CoverageAnalysis]: Checked inductivity of 532 backedges. 32 proven. 20 refuted. 0 times theorem prover too weak. 480 trivial. 0 not checked. [2022-07-19 15:04:21,551 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 15:04:21,551 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [631995026] [2022-07-19 15:04:21,551 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [631995026] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-19 15:04:21,551 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [149995052] [2022-07-19 15:04:21,551 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 15:04:21,552 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 15:04:21,552 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-19 15:04:21,553 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-19 15:04:21,554 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-07-19 15:04:21,594 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 15:04:21,595 INFO L263 TraceCheckSpWp]: Trace formula consists of 236 conjuncts, 8 conjunts are in the unsatisfiable core [2022-07-19 15:04:21,597 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-19 15:04:21,821 INFO L134 CoverageAnalysis]: Checked inductivity of 532 backedges. 153 proven. 7 refuted. 0 times theorem prover too weak. 372 trivial. 0 not checked. [2022-07-19 15:04:21,821 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-19 15:04:22,011 INFO L134 CoverageAnalysis]: Checked inductivity of 532 backedges. 44 proven. 8 refuted. 0 times theorem prover too weak. 480 trivial. 0 not checked. [2022-07-19 15:04:22,011 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [149995052] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-19 15:04:22,011 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-19 15:04:22,011 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 23 [2022-07-19 15:04:22,013 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [140772682] [2022-07-19 15:04:22,013 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-19 15:04:22,014 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-07-19 15:04:22,015 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 15:04:22,015 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-07-19 15:04:22,015 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=442, Unknown=0, NotChecked=0, Total=506 [2022-07-19 15:04:22,016 INFO L87 Difference]: Start difference. First operand 228 states and 349 transitions. Second operand has 23 states, 23 states have (on average 3.0434782608695654) internal successors, (70), 22 states have internal predecessors, (70), 12 states have call successors, (50), 3 states have call predecessors, (50), 2 states have return successors, (48), 12 states have call predecessors, (48), 12 states have call successors, (48) [2022-07-19 15:04:32,217 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-19 15:04:32,217 INFO L93 Difference]: Finished difference Result 1355 states and 2162 transitions. [2022-07-19 15:04:32,217 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 146 states. [2022-07-19 15:04:32,218 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 3.0434782608695654) internal successors, (70), 22 states have internal predecessors, (70), 12 states have call successors, (50), 3 states have call predecessors, (50), 2 states have return successors, (48), 12 states have call predecessors, (48), 12 states have call successors, (48) Word has length 107 [2022-07-19 15:04:32,218 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-19 15:04:32,221 INFO L225 Difference]: With dead ends: 1355 [2022-07-19 15:04:32,222 INFO L226 Difference]: Without dead ends: 935 [2022-07-19 15:04:32,227 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 393 GetRequests, 232 SyntacticMatches, 0 SemanticMatches, 161 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10006 ImplicationChecksByTransitivity, 3.9s TimeCoverageRelationStatistics Valid=3317, Invalid=23089, Unknown=0, NotChecked=0, Total=26406 [2022-07-19 15:04:32,227 INFO L413 NwaCegarLoop]: 649 mSDtfsCounter, 1053 mSDsluCounter, 2065 mSDsCounter, 0 mSdLazyCounter, 9840 mSolverCounterSat, 3370 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 5.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1057 SdHoareTripleChecker+Valid, 2714 SdHoareTripleChecker+Invalid, 13210 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3370 IncrementalHoareTripleChecker+Valid, 9840 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 5.9s IncrementalHoareTripleChecker+Time [2022-07-19 15:04:32,228 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1057 Valid, 2714 Invalid, 13210 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3370 Valid, 9840 Invalid, 0 Unknown, 0 Unchecked, 5.9s Time] [2022-07-19 15:04:32,228 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 935 states. [2022-07-19 15:04:32,303 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 935 to 364. [2022-07-19 15:04:32,304 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 364 states, 172 states have (on average 1.2616279069767442) internal successors, (217), 185 states have internal predecessors, (217), 175 states have call successors, (175), 16 states have call predecessors, (175), 16 states have return successors, (175), 162 states have call predecessors, (175), 175 states have call successors, (175) [2022-07-19 15:04:32,305 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 364 states to 364 states and 567 transitions. [2022-07-19 15:04:32,306 INFO L78 Accepts]: Start accepts. Automaton has 364 states and 567 transitions. Word has length 107 [2022-07-19 15:04:32,306 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-19 15:04:32,306 INFO L495 AbstractCegarLoop]: Abstraction has 364 states and 567 transitions. [2022-07-19 15:04:32,306 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 3.0434782608695654) internal successors, (70), 22 states have internal predecessors, (70), 12 states have call successors, (50), 3 states have call predecessors, (50), 2 states have return successors, (48), 12 states have call predecessors, (48), 12 states have call successors, (48) [2022-07-19 15:04:32,306 INFO L276 IsEmpty]: Start isEmpty. Operand 364 states and 567 transitions. [2022-07-19 15:04:32,307 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 113 [2022-07-19 15:04:32,307 INFO L187 NwaCegarLoop]: Found error trace [2022-07-19 15:04:32,307 INFO L195 NwaCegarLoop]: trace histogram [18, 17, 17, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-19 15:04:32,324 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2022-07-19 15:04:32,523 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 15:04:32,523 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-19 15:04:32,524 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 15:04:32,524 INFO L85 PathProgramCache]: Analyzing trace with hash 1988686597, now seen corresponding path program 1 times [2022-07-19 15:04:32,524 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 15:04:32,524 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1512408073] [2022-07-19 15:04:32,524 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 15:04:32,524 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 15:04:32,531 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 15:04:32,574 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-07-19 15:04:32,575 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 15:04:32,576 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-07-19 15:04:32,576 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 15:04:32,577 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2022-07-19 15:04:32,577 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 15:04:32,578 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 25 [2022-07-19 15:04:32,578 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 15:04:32,579 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 34 [2022-07-19 15:04:32,580 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 15:04:32,581 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2022-07-19 15:04:32,581 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 15:04:32,582 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 44 [2022-07-19 15:04:32,582 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 15:04:32,583 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 49 [2022-07-19 15:04:32,584 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 15:04:32,585 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 56 [2022-07-19 15:04:32,585 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 15:04:32,588 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 61 [2022-07-19 15:04:32,588 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 15:04:32,589 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 68 [2022-07-19 15:04:32,590 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 15:04:32,590 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 73 [2022-07-19 15:04:32,591 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 15:04:32,591 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 78 [2022-07-19 15:04:32,591 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 15:04:32,592 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 83 [2022-07-19 15:04:32,592 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 15:04:32,593 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 91 [2022-07-19 15:04:32,593 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 15:04:32,594 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 96 [2022-07-19 15:04:32,594 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 15:04:32,595 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 103 [2022-07-19 15:04:32,595 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 15:04:32,596 INFO L134 CoverageAnalysis]: Checked inductivity of 599 backedges. 34 proven. 21 refuted. 0 times theorem prover too weak. 544 trivial. 0 not checked. [2022-07-19 15:04:32,596 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 15:04:32,596 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1512408073] [2022-07-19 15:04:32,596 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1512408073] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-19 15:04:32,596 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1674443585] [2022-07-19 15:04:32,596 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 15:04:32,596 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 15:04:32,597 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-19 15:04:32,598 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-19 15:04:32,599 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-07-19 15:04:32,634 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 15:04:32,635 INFO L263 TraceCheckSpWp]: Trace formula consists of 244 conjuncts, 9 conjunts are in the unsatisfiable core [2022-07-19 15:04:32,637 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-19 15:04:32,792 INFO L134 CoverageAnalysis]: Checked inductivity of 599 backedges. 34 proven. 21 refuted. 0 times theorem prover too weak. 544 trivial. 0 not checked. [2022-07-19 15:04:32,792 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-19 15:04:32,929 INFO L134 CoverageAnalysis]: Checked inductivity of 599 backedges. 34 proven. 21 refuted. 0 times theorem prover too weak. 544 trivial. 0 not checked. [2022-07-19 15:04:32,929 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1674443585] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-19 15:04:32,929 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-19 15:04:32,929 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 20 [2022-07-19 15:04:32,929 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1513665035] [2022-07-19 15:04:32,930 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-19 15:04:32,930 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-07-19 15:04:32,930 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 15:04:32,930 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-07-19 15:04:32,931 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=323, Unknown=0, NotChecked=0, Total=380 [2022-07-19 15:04:32,931 INFO L87 Difference]: Start difference. First operand 364 states and 567 transitions. Second operand has 20 states, 20 states have (on average 3.3) internal successors, (66), 18 states have internal predecessors, (66), 8 states have call successors, (50), 3 states have call predecessors, (50), 1 states have return successors, (47), 8 states have call predecessors, (47), 8 states have call successors, (47) [2022-07-19 15:04:34,287 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-19 15:04:34,287 INFO L93 Difference]: Finished difference Result 755 states and 1189 transitions. [2022-07-19 15:04:34,288 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2022-07-19 15:04:34,288 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 3.3) internal successors, (66), 18 states have internal predecessors, (66), 8 states have call successors, (50), 3 states have call predecessors, (50), 1 states have return successors, (47), 8 states have call predecessors, (47), 8 states have call successors, (47) Word has length 112 [2022-07-19 15:04:34,288 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-19 15:04:34,291 INFO L225 Difference]: With dead ends: 755 [2022-07-19 15:04:34,291 INFO L226 Difference]: Without dead ends: 632 [2022-07-19 15:04:34,292 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 290 GetRequests, 246 SyntacticMatches, 2 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 410 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=472, Invalid=1420, Unknown=0, NotChecked=0, Total=1892 [2022-07-19 15:04:34,292 INFO L413 NwaCegarLoop]: 168 mSDtfsCounter, 366 mSDsluCounter, 492 mSDsCounter, 0 mSdLazyCounter, 1328 mSolverCounterSat, 1022 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 366 SdHoareTripleChecker+Valid, 660 SdHoareTripleChecker+Invalid, 2350 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1022 IncrementalHoareTripleChecker+Valid, 1328 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-07-19 15:04:34,293 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [366 Valid, 660 Invalid, 2350 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1022 Valid, 1328 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2022-07-19 15:04:34,293 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 632 states. [2022-07-19 15:04:34,359 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 632 to 361. [2022-07-19 15:04:34,360 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 361 states, 170 states have (on average 1.2705882352941176) internal successors, (216), 186 states have internal predecessors, (216), 171 states have call successors, (171), 19 states have call predecessors, (171), 19 states have return successors, (171), 155 states have call predecessors, (171), 171 states have call successors, (171) [2022-07-19 15:04:34,361 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 361 states to 361 states and 558 transitions. [2022-07-19 15:04:34,361 INFO L78 Accepts]: Start accepts. Automaton has 361 states and 558 transitions. Word has length 112 [2022-07-19 15:04:34,361 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-19 15:04:34,362 INFO L495 AbstractCegarLoop]: Abstraction has 361 states and 558 transitions. [2022-07-19 15:04:34,362 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 3.3) internal successors, (66), 18 states have internal predecessors, (66), 8 states have call successors, (50), 3 states have call predecessors, (50), 1 states have return successors, (47), 8 states have call predecessors, (47), 8 states have call successors, (47) [2022-07-19 15:04:34,362 INFO L276 IsEmpty]: Start isEmpty. Operand 361 states and 558 transitions. [2022-07-19 15:04:34,363 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 152 [2022-07-19 15:04:34,363 INFO L187 NwaCegarLoop]: Found error trace [2022-07-19 15:04:34,363 INFO L195 NwaCegarLoop]: trace histogram [25, 24, 24, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-19 15:04:34,379 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2022-07-19 15:04:34,579 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 15:04:34,579 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-19 15:04:34,580 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 15:04:34,580 INFO L85 PathProgramCache]: Analyzing trace with hash 2043931853, now seen corresponding path program 1 times [2022-07-19 15:04:34,580 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 15:04:34,580 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1146590016] [2022-07-19 15:04:34,580 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 15:04:34,580 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 15:04:34,591 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 15:04:34,623 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-07-19 15:04:34,624 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 15:04:34,625 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-07-19 15:04:34,625 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 15:04:34,626 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2022-07-19 15:04:34,626 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 15:04:34,626 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2022-07-19 15:04:34,627 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 15:04:34,627 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 29 [2022-07-19 15:04:34,628 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 15:04:34,628 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 34 [2022-07-19 15:04:34,628 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 15:04:34,631 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 42 [2022-07-19 15:04:34,632 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 15:04:34,633 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 47 [2022-07-19 15:04:34,633 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 15:04:34,635 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 56 [2022-07-19 15:04:34,635 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 15:04:34,636 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 61 [2022-07-19 15:04:34,636 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 15:04:34,637 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 66 [2022-07-19 15:04:34,638 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 15:04:34,639 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 71 [2022-07-19 15:04:34,639 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 15:04:34,640 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 78 [2022-07-19 15:04:34,640 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 15:04:34,641 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 83 [2022-07-19 15:04:34,641 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 15:04:34,643 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 90 [2022-07-19 15:04:34,643 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 15:04:34,644 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 95 [2022-07-19 15:04:34,644 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 15:04:34,645 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 100 [2022-07-19 15:04:34,646 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 15:04:34,646 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 105 [2022-07-19 15:04:34,647 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 15:04:34,648 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 113 [2022-07-19 15:04:34,648 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 15:04:34,649 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 118 [2022-07-19 15:04:34,649 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 15:04:34,650 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 123 [2022-07-19 15:04:34,655 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 15:04:34,656 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 128 [2022-07-19 15:04:34,657 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 15:04:34,657 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 135 [2022-07-19 15:04:34,658 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 15:04:34,658 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 140 [2022-07-19 15:04:34,659 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 15:04:34,660 INFO L134 CoverageAnalysis]: Checked inductivity of 1190 backedges. 73 proven. 13 refuted. 0 times theorem prover too weak. 1104 trivial. 0 not checked. [2022-07-19 15:04:34,660 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 15:04:34,660 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1146590016] [2022-07-19 15:04:34,660 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1146590016] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-19 15:04:34,660 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2129893909] [2022-07-19 15:04:34,660 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 15:04:34,660 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 15:04:34,660 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-19 15:04:34,661 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-19 15:04:34,662 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-07-19 15:04:34,708 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 15:04:34,709 INFO L263 TraceCheckSpWp]: Trace formula consists of 318 conjuncts, 10 conjunts are in the unsatisfiable core [2022-07-19 15:04:34,711 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-19 15:04:34,967 INFO L134 CoverageAnalysis]: Checked inductivity of 1190 backedges. 491 proven. 15 refuted. 0 times theorem prover too weak. 684 trivial. 0 not checked. [2022-07-19 15:04:34,967 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-19 15:04:35,187 INFO L134 CoverageAnalysis]: Checked inductivity of 1190 backedges. 69 proven. 17 refuted. 0 times theorem prover too weak. 1104 trivial. 0 not checked. [2022-07-19 15:04:35,187 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2129893909] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-19 15:04:35,187 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-19 15:04:35,187 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 23 [2022-07-19 15:04:35,187 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [21562230] [2022-07-19 15:04:35,188 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-19 15:04:35,188 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-07-19 15:04:35,188 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 15:04:35,188 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-07-19 15:04:35,189 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=425, Unknown=0, NotChecked=0, Total=506 [2022-07-19 15:04:35,189 INFO L87 Difference]: Start difference. First operand 361 states and 558 transitions. Second operand has 23 states, 23 states have (on average 3.608695652173913) internal successors, (83), 22 states have internal predecessors, (83), 14 states have call successors, (74), 3 states have call predecessors, (74), 2 states have return successors, (72), 14 states have call predecessors, (72), 14 states have call successors, (72) [2022-07-19 15:04:38,084 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-19 15:04:38,084 INFO L93 Difference]: Finished difference Result 943 states and 1482 transitions. [2022-07-19 15:04:38,087 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 52 states. [2022-07-19 15:04:38,087 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 3.608695652173913) internal successors, (83), 22 states have internal predecessors, (83), 14 states have call successors, (74), 3 states have call predecessors, (74), 2 states have return successors, (72), 14 states have call predecessors, (72), 14 states have call successors, (72) Word has length 151 [2022-07-19 15:04:38,087 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-19 15:04:38,090 INFO L225 Difference]: With dead ends: 943 [2022-07-19 15:04:38,090 INFO L226 Difference]: Without dead ends: 695 [2022-07-19 15:04:38,092 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 423 GetRequests, 355 SyntacticMatches, 0 SemanticMatches, 68 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1329 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=1015, Invalid=3815, Unknown=0, NotChecked=0, Total=4830 [2022-07-19 15:04:38,093 INFO L413 NwaCegarLoop]: 246 mSDtfsCounter, 270 mSDsluCounter, 952 mSDsCounter, 0 mSdLazyCounter, 3652 mSolverCounterSat, 1039 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 270 SdHoareTripleChecker+Valid, 1198 SdHoareTripleChecker+Invalid, 4691 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1039 IncrementalHoareTripleChecker+Valid, 3652 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.9s IncrementalHoareTripleChecker+Time [2022-07-19 15:04:38,093 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [270 Valid, 1198 Invalid, 4691 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1039 Valid, 3652 Invalid, 0 Unknown, 0 Unchecked, 1.9s Time] [2022-07-19 15:04:38,093 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 695 states. [2022-07-19 15:04:38,214 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 695 to 547. [2022-07-19 15:04:38,215 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 547 states, 249 states have (on average 1.3092369477911647) internal successors, (326), 274 states have internal predecessors, (326), 276 states have call successors, (276), 21 states have call predecessors, (276), 21 states have return successors, (276), 251 states have call predecessors, (276), 276 states have call successors, (276) [2022-07-19 15:04:38,217 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 547 states to 547 states and 878 transitions. [2022-07-19 15:04:38,217 INFO L78 Accepts]: Start accepts. Automaton has 547 states and 878 transitions. Word has length 151 [2022-07-19 15:04:38,218 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-19 15:04:38,218 INFO L495 AbstractCegarLoop]: Abstraction has 547 states and 878 transitions. [2022-07-19 15:04:38,218 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 3.608695652173913) internal successors, (83), 22 states have internal predecessors, (83), 14 states have call successors, (74), 3 states have call predecessors, (74), 2 states have return successors, (72), 14 states have call predecessors, (72), 14 states have call successors, (72) [2022-07-19 15:04:38,218 INFO L276 IsEmpty]: Start isEmpty. Operand 547 states and 878 transitions. [2022-07-19 15:04:38,219 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 152 [2022-07-19 15:04:38,219 INFO L187 NwaCegarLoop]: Found error trace [2022-07-19 15:04:38,220 INFO L195 NwaCegarLoop]: trace histogram [25, 24, 24, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-19 15:04:38,238 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2022-07-19 15:04:38,433 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 15:04:38,433 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-19 15:04:38,433 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 15:04:38,433 INFO L85 PathProgramCache]: Analyzing trace with hash -1363812597, now seen corresponding path program 1 times [2022-07-19 15:04:38,433 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 15:04:38,433 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1742615419] [2022-07-19 15:04:38,434 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 15:04:38,434 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 15:04:38,441 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 15:04:38,469 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-07-19 15:04:38,470 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 15:04:38,471 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-07-19 15:04:38,471 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 15:04:38,472 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2022-07-19 15:04:38,472 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 15:04:38,472 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2022-07-19 15:04:38,474 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 15:04:38,474 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 29 [2022-07-19 15:04:38,475 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 15:04:38,475 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 34 [2022-07-19 15:04:38,475 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 15:04:38,476 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 42 [2022-07-19 15:04:38,476 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 15:04:38,477 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 47 [2022-07-19 15:04:38,477 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 15:04:38,478 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 56 [2022-07-19 15:04:38,478 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 15:04:38,479 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 61 [2022-07-19 15:04:38,479 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 15:04:38,481 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 66 [2022-07-19 15:04:38,481 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 15:04:38,482 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 71 [2022-07-19 15:04:38,482 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 15:04:38,483 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 78 [2022-07-19 15:04:38,483 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 15:04:38,495 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 83 [2022-07-19 15:04:38,496 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 15:04:38,509 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 90 [2022-07-19 15:04:38,510 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 15:04:38,511 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 95 [2022-07-19 15:04:38,512 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 15:04:38,512 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 100 [2022-07-19 15:04:38,513 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 15:04:38,513 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 105 [2022-07-19 15:04:38,514 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 15:04:38,514 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 113 [2022-07-19 15:04:38,515 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 15:04:38,515 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 118 [2022-07-19 15:04:38,516 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 15:04:38,516 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 123 [2022-07-19 15:04:38,517 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 15:04:38,517 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 128 [2022-07-19 15:04:38,518 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 15:04:38,518 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 135 [2022-07-19 15:04:38,519 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 15:04:38,519 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 140 [2022-07-19 15:04:38,520 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 15:04:38,521 INFO L134 CoverageAnalysis]: Checked inductivity of 1190 backedges. 73 proven. 13 refuted. 0 times theorem prover too weak. 1104 trivial. 0 not checked. [2022-07-19 15:04:38,521 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 15:04:38,521 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1742615419] [2022-07-19 15:04:38,521 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1742615419] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-19 15:04:38,521 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [558702120] [2022-07-19 15:04:38,521 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 15:04:38,521 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 15:04:38,521 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-19 15:04:38,522 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-19 15:04:38,523 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2022-07-19 15:04:38,569 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 15:04:38,570 INFO L263 TraceCheckSpWp]: Trace formula consists of 317 conjuncts, 7 conjunts are in the unsatisfiable core [2022-07-19 15:04:38,571 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-19 15:04:38,633 INFO L134 CoverageAnalysis]: Checked inductivity of 1190 backedges. 73 proven. 13 refuted. 0 times theorem prover too weak. 1104 trivial. 0 not checked. [2022-07-19 15:04:38,633 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-19 15:04:38,755 INFO L134 CoverageAnalysis]: Checked inductivity of 1190 backedges. 73 proven. 13 refuted. 0 times theorem prover too weak. 1104 trivial. 0 not checked. [2022-07-19 15:04:38,755 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [558702120] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-19 15:04:38,755 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-19 15:04:38,755 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 12 [2022-07-19 15:04:38,755 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1192913920] [2022-07-19 15:04:38,755 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-19 15:04:38,756 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-07-19 15:04:38,756 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 15:04:38,756 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-07-19 15:04:38,756 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=106, Unknown=0, NotChecked=0, Total=132 [2022-07-19 15:04:38,757 INFO L87 Difference]: Start difference. First operand 547 states and 878 transitions. Second operand has 12 states, 12 states have (on average 4.083333333333333) internal successors, (49), 10 states have internal predecessors, (49), 6 states have call successors, (43), 3 states have call predecessors, (43), 1 states have return successors, (40), 6 states have call predecessors, (40), 6 states have call successors, (40) [2022-07-19 15:04:39,076 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-19 15:04:39,076 INFO L93 Difference]: Finished difference Result 591 states and 939 transitions. [2022-07-19 15:04:39,077 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-07-19 15:04:39,077 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 4.083333333333333) internal successors, (49), 10 states have internal predecessors, (49), 6 states have call successors, (43), 3 states have call predecessors, (43), 1 states have return successors, (40), 6 states have call predecessors, (40), 6 states have call successors, (40) Word has length 151 [2022-07-19 15:04:39,077 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-19 15:04:39,079 INFO L225 Difference]: With dead ends: 591 [2022-07-19 15:04:39,079 INFO L226 Difference]: Without dead ends: 519 [2022-07-19 15:04:39,082 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 363 GetRequests, 344 SyntacticMatches, 4 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 31 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=65, Invalid=207, Unknown=0, NotChecked=0, Total=272 [2022-07-19 15:04:39,082 INFO L413 NwaCegarLoop]: 62 mSDtfsCounter, 45 mSDsluCounter, 187 mSDsCounter, 0 mSdLazyCounter, 405 mSolverCounterSat, 88 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 45 SdHoareTripleChecker+Valid, 249 SdHoareTripleChecker+Invalid, 493 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 88 IncrementalHoareTripleChecker+Valid, 405 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-07-19 15:04:39,082 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [45 Valid, 249 Invalid, 493 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [88 Valid, 405 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-07-19 15:04:39,083 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 519 states. [2022-07-19 15:04:39,186 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 519 to 489. [2022-07-19 15:04:39,186 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 489 states, 228 states have (on average 1.293859649122807) internal successors, (295), 250 states have internal predecessors, (295), 238 states have call successors, (238), 22 states have call predecessors, (238), 22 states have return successors, (238), 216 states have call predecessors, (238), 238 states have call successors, (238) [2022-07-19 15:04:39,188 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 489 states to 489 states and 771 transitions. [2022-07-19 15:04:39,188 INFO L78 Accepts]: Start accepts. Automaton has 489 states and 771 transitions. Word has length 151 [2022-07-19 15:04:39,190 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-19 15:04:39,191 INFO L495 AbstractCegarLoop]: Abstraction has 489 states and 771 transitions. [2022-07-19 15:04:39,191 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 4.083333333333333) internal successors, (49), 10 states have internal predecessors, (49), 6 states have call successors, (43), 3 states have call predecessors, (43), 1 states have return successors, (40), 6 states have call predecessors, (40), 6 states have call successors, (40) [2022-07-19 15:04:39,191 INFO L276 IsEmpty]: Start isEmpty. Operand 489 states and 771 transitions. [2022-07-19 15:04:39,198 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 219 [2022-07-19 15:04:39,198 INFO L187 NwaCegarLoop]: Found error trace [2022-07-19 15:04:39,198 INFO L195 NwaCegarLoop]: trace histogram [36, 35, 35, 5, 5, 5, 5, 5, 5, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1] [2022-07-19 15:04:39,216 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2022-07-19 15:04:39,398 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable22 [2022-07-19 15:04:39,399 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-19 15:04:39,399 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 15:04:39,399 INFO L85 PathProgramCache]: Analyzing trace with hash 2090740703, now seen corresponding path program 2 times [2022-07-19 15:04:39,399 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 15:04:39,399 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1962016875] [2022-07-19 15:04:39,399 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 15:04:39,399 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 15:04:39,409 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 15:04:39,452 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-07-19 15:04:39,453 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 15:04:39,454 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-07-19 15:04:39,454 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 15:04:39,455 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2022-07-19 15:04:39,455 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 15:04:39,456 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 25 [2022-07-19 15:04:39,456 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 15:04:39,456 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 34 [2022-07-19 15:04:39,457 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 15:04:39,457 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2022-07-19 15:04:39,458 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 15:04:39,459 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 44 [2022-07-19 15:04:39,459 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 15:04:39,463 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 49 [2022-07-19 15:04:39,464 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 15:04:39,465 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 56 [2022-07-19 15:04:39,466 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 15:04:39,466 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 61 [2022-07-19 15:04:39,466 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 15:04:39,468 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 69 [2022-07-19 15:04:39,468 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 15:04:39,469 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 74 [2022-07-19 15:04:39,469 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 15:04:39,470 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 83 [2022-07-19 15:04:39,470 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 15:04:39,471 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 88 [2022-07-19 15:04:39,472 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 15:04:39,473 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 93 [2022-07-19 15:04:39,473 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 15:04:39,474 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 98 [2022-07-19 15:04:39,474 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 15:04:39,476 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 105 [2022-07-19 15:04:39,476 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 15:04:39,477 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 110 [2022-07-19 15:04:39,478 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 15:04:39,479 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 117 [2022-07-19 15:04:39,479 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 15:04:39,480 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 122 [2022-07-19 15:04:39,480 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 15:04:39,481 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 127 [2022-07-19 15:04:39,482 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 15:04:39,482 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 132 [2022-07-19 15:04:39,484 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 15:04:39,485 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 140 [2022-07-19 15:04:39,485 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 15:04:39,486 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 145 [2022-07-19 15:04:39,486 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 15:04:39,487 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 150 [2022-07-19 15:04:39,487 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 15:04:39,488 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 155 [2022-07-19 15:04:39,488 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 15:04:39,489 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 162 [2022-07-19 15:04:39,489 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 15:04:39,490 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 167 [2022-07-19 15:04:39,490 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 15:04:39,491 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 174 [2022-07-19 15:04:39,491 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 15:04:39,493 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 179 [2022-07-19 15:04:39,493 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 15:04:39,494 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 184 [2022-07-19 15:04:39,495 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 15:04:39,496 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 189 [2022-07-19 15:04:39,496 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 15:04:39,497 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 197 [2022-07-19 15:04:39,497 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 15:04:39,498 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 202 [2022-07-19 15:04:39,498 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 15:04:39,499 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 209 [2022-07-19 15:04:39,499 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 15:04:39,501 INFO L134 CoverageAnalysis]: Checked inductivity of 2544 backedges. 70 proven. 49 refuted. 0 times theorem prover too weak. 2425 trivial. 0 not checked. [2022-07-19 15:04:39,502 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 15:04:39,503 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1962016875] [2022-07-19 15:04:39,503 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1962016875] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-19 15:04:39,503 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [992457041] [2022-07-19 15:04:39,503 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-07-19 15:04:39,503 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 15:04:39,503 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-19 15:04:39,504 INFO L229 MonitoredProcess]: Starting monitored process 10 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-19 15:04:39,505 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2022-07-19 15:04:39,566 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-07-19 15:04:39,566 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-19 15:04:39,568 INFO L263 TraceCheckSpWp]: Trace formula consists of 440 conjuncts, 9 conjunts are in the unsatisfiable core [2022-07-19 15:04:39,570 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-19 15:04:39,799 INFO L134 CoverageAnalysis]: Checked inductivity of 2544 backedges. 1243 proven. 33 refuted. 0 times theorem prover too weak. 1268 trivial. 0 not checked. [2022-07-19 15:04:39,799 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-19 15:04:40,121 INFO L134 CoverageAnalysis]: Checked inductivity of 2544 backedges. 123 proven. 35 refuted. 0 times theorem prover too weak. 2386 trivial. 0 not checked. [2022-07-19 15:04:40,121 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [992457041] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-19 15:04:40,122 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-19 15:04:40,122 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10, 10] total 25 [2022-07-19 15:04:40,122 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2011763838] [2022-07-19 15:04:40,122 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-19 15:04:40,123 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-07-19 15:04:40,123 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 15:04:40,123 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-07-19 15:04:40,123 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=528, Unknown=0, NotChecked=0, Total=600 [2022-07-19 15:04:40,124 INFO L87 Difference]: Start difference. First operand 489 states and 771 transitions. Second operand has 25 states, 25 states have (on average 3.88) internal successors, (97), 24 states have internal predecessors, (97), 14 states have call successors, (82), 3 states have call predecessors, (82), 2 states have return successors, (81), 14 states have call predecessors, (81), 14 states have call successors, (81) [2022-07-19 15:04:47,208 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-19 15:04:47,208 INFO L93 Difference]: Finished difference Result 1646 states and 2663 transitions. [2022-07-19 15:04:47,208 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 123 states. [2022-07-19 15:04:47,209 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 3.88) internal successors, (97), 24 states have internal predecessors, (97), 14 states have call successors, (82), 3 states have call predecessors, (82), 2 states have return successors, (81), 14 states have call predecessors, (81), 14 states have call successors, (81) Word has length 218 [2022-07-19 15:04:47,209 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-19 15:04:47,209 INFO L225 Difference]: With dead ends: 1646 [2022-07-19 15:04:47,209 INFO L226 Difference]: Without dead ends: 0 [2022-07-19 15:04:47,216 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 632 GetRequests, 490 SyntacticMatches, 0 SemanticMatches, 142 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7586 ImplicationChecksByTransitivity, 3.2s TimeCoverageRelationStatistics Valid=3283, Invalid=17309, Unknown=0, NotChecked=0, Total=20592 [2022-07-19 15:04:47,216 INFO L413 NwaCegarLoop]: 427 mSDtfsCounter, 564 mSDsluCounter, 1112 mSDsCounter, 0 mSdLazyCounter, 5901 mSolverCounterSat, 2838 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 564 SdHoareTripleChecker+Valid, 1539 SdHoareTripleChecker+Invalid, 8739 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2838 IncrementalHoareTripleChecker+Valid, 5901 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.5s IncrementalHoareTripleChecker+Time [2022-07-19 15:04:47,217 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [564 Valid, 1539 Invalid, 8739 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2838 Valid, 5901 Invalid, 0 Unknown, 0 Unchecked, 3.5s Time] [2022-07-19 15:04:47,217 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2022-07-19 15:04:47,217 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2022-07-19 15:04:47,217 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 0 states, 0 states have (on average 0.0) internal successors, (0), 0 states have internal predecessors, (0), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 15:04:47,217 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2022-07-19 15:04:47,218 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 218 [2022-07-19 15:04:47,218 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-19 15:04:47,218 INFO L495 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2022-07-19 15:04:47,218 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 3.88) internal successors, (97), 24 states have internal predecessors, (97), 14 states have call successors, (82), 3 states have call predecessors, (82), 2 states have return successors, (81), 14 states have call predecessors, (81), 14 states have call successors, (81) [2022-07-19 15:04:47,218 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2022-07-19 15:04:47,218 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2022-07-19 15:04:47,220 INFO L805 garLoopResultBuilder]: Registering result SAFE for location __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 1 remaining) [2022-07-19 15:04:47,237 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2022-07-19 15:04:47,431 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable23 [2022-07-19 15:04:47,433 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2022-07-19 15:04:59,836 WARN L233 SmtUtils]: Spent 12.40s on a formula simplification. DAG size of input: 417 DAG size of output: 401 (called from [L 182] de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.HoareAnnotationComposer.or)